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Archive for June, 2010

Gasification Sees a New Dawn

If you search for gasification and terms like “wood stove” on video sharing sites these days you will see demonstrations of wood being burnt in little stoves which seem to something almost miraculous and quite different from our idea of wood as a fuel. These little boilers light rapidly, produce no detectable smoke after the initial lighting and firing, and burn very hot.

So what is the technique which is being used, and how might it help us all in weaning society off fossil fuels?

What you have seen is a method of gasification. It differs from combustion in that it uses just 20% to 30% of the air or oxygen necessary for complete fuel combustion. During gasification, the amount of air supplied to the gasifier is carefully controlled with the effect that only a small part of the fuel burns completely. Trials of this process have illustrated that up to 70% of the energy value of the fue used can be recovered as what is known as synthesis gas, or syngas. This producer gas can also be used for various applications similar to natural gas.

This is a part of the magic, and not one really shown in the YouTube type videos, but it makes this method even more useful. This is due to the fact that syngas can be put to useful work, in both drying the feed fuel prior to gasification and after collection and storage it can be used as a fossil fuel replacement, and renewable energy source. When a gasification plant also includes Combined Heat and Power (CHP) and/or electricity export from the site, the gains are even more impressive.

Gasification in addition promises to be the most efficient long-term solution for capturing carbon while utilizing these valuable feedstocks, and storing the CO2 for very long priods, to reduce or halt global warming.

Gasification of wood and wood-type residues and waste in fixed bed or fluidised bed gasifiers with subsequent burning of the gas for heat production is has become state of the art with designers of thes systems working hard to gain the absolute maximum efficiency out of these systems.

These wood gasifiers which are located primarily in the Scandinavian countries are used almost entirely for space heating heat generation. Gasification of biomass is the renewable fuel system preferred by many, and can be defined as the thermal conversion of solid biomass to gaseous fuel.

Gasification has been around for over a hundred years, but the benefits of biochar are only now being discovered. Furthermore, it is still a wide-open field.

Before electric lighting was available in cities there were street lamps fuelled by gasified coal. It is easy to forget that the process has been reliably used on a commercial scale worldwide for more than 50 years in the refining, fertilizer, and chemical industries, and for more than 35 years in the electric power industry. More than 75 companies involved in the development, licensing, and use of these technologies as well as engineering, construction, equipment manufacturing and production of synthesis gas by gasification from coal, petroleum coke, heavy oils and other hydrocarbons.

Gasification has been proven to be a viable technology for CO2 capture and reducing SOx, NOx, particulate matter, and mercury emissions from coal and petcoke-fired power plants, synthetic fuels production, and chemical facilities.

Plants in this category have been capturing carbon dioxide for several decades in chemical plants in China and the United States. It also has potential contributions to make to both transportation and electrical power energy markets. With ongoing concerns about the price and availability of oil, populous countries like the U.S. gasification has proven to be in high demand and quite successful. However, it can also be used in conjunction with gas engines and gas turbines to obtain a higher conversion efficiency than conventional fossil-fuel electric power generation. Gasification can help meet renewable energy targets, address concerns about global warming, and contribute to meeting global environmental targets.

Steve has built a great web site where there is a lot more information about gasification. This is a hot subject indeed for this technology which has become an essential read for all those in alternative energy and interested in taking action to reduce the impact of climate change.

Build Your Own Soda Can Solar Heater

We recently featured one way to heat your house with the sun, but DIYer Daniel Strohl has spent three years perfecting his homemade solar garage heater, made out of a wooden box, some vacuum parts, and a lot of empty soda cans.

Solar Ovens Prove Greenhouse Gas Theory is cooked

An American university study of solar ovens has produced a surprising result: an astonishing debunk of the global warming theory.

City Hall protest planned by would-be solar panel workers | San …

Unemployed San Franciscans are expected to protest today at City Hall against a recent San Francisco ruling that threatens to lock laborers out of future municipal solar power construction projects. The San Francisco Office of Labor …

Solar Powered Mobile Phone Arrives In India – PSFK

Samsung has launched a low-cost, sun powered mobile phone, giving users in remote areas with little access to electricity a method for charging.

Facts Do It Yourself Solar Panels

Nowadays with electricity costs climbing, it seems that it’s a very smart move to invest in solar panels to leverage the power of the sun. It can be great for providing power for your lights, hot tub or even for power when you go on a …

What is the Real CO2 Footprint of a Product?

We’ve certainly seen quite a few companies come out and say that their manufacturing facilities have a zero impact on the environment, meaning zero footprint, but indeed, there is much controversy on how to determine what a zero foot print is. It’s almost impossible to get to zero, even if a company goes and plants 10,000 trees over the course of 5-years.

The other day at a Think Tank meeting, we were talking about how to establish a complete CO2 discharge chain of a product, including all its components in the process of making it. From the wrappers, card board box, printing, assembly, energy to do all that, the distance the people traveled to work in what type of cars, etc. I mean really narrowing down the actual discharges.

Not because we are Global Warming alarmists, but because we feel it is not exactly correct for a company to claim Zero Emissions. And that we must have a more realistic view of the total process, Supply chain and all.

Many companies like Dell in Texas have stated that they have finally achieved zero emissions, but they were attacked for stating that, why? Because, everyone has a different concept of what nothing is. In other words we are all out there fighting over nothing and that makes no sense to anyone, no matter how you figure it.

Indeed, we should be applauding Dell for their solar panels, LEEDs certified warehouses and assembly plant and all their hard work and meaningful dedication to do the right thing. And yet, we are not doing that are we? Instead we find people attacking businesses, even those that go out of their way, spending millions of dollars to do the right thing. I ask are we doing the right thing by allowing persnickety environmental complainers to attack America’s greatest companies?

Lance Winslow – Lance Winslow’s Bio. If you have innovative thoughts and unique perspectives, come think with Lance; http://www.WorldThinkTank.net/.

Green Solar Lumenhaus Wins in Europe!

The team from Virginia Tech just took the top prize at Solar Decathlon Europe with their house pavilion, Lumenhaus, which was inspired by the Farnsworth House. The deep green home was on display in the Solar Village in Madrid and viewed …

Solar Powered Mototaxi Aims To Reduce Pollution

A professor at the University of San Marcos has created a solar panel fitted on a.

Goldman Sachs (GS) Initiates Solar Coverage: Buy FSLR, Neutral …

The big gorilla Goldman Sachs (GS) has finally begun covering the solar sector and initiated coverage of the US solar sector with a Neutral rating and initiated.

Dazzling Solar-Powered Chandelier Pops up in London | Inhabitat …

Don’t be startled if you see a strange pink structure sitting in London’s Belgrave Square this weekend–it’s just OR2, a combination shading device and solar-powered chandelier designed by Orproject, a group of London-based architects …

Healthy Financial Habits » Blog Archive » Residential vertical …

With all of the current tax incentives, tax credits, and rebates being offered on solar and wind power energy systems, it is certainly worth looking into if you are a home owner. Many people install energy systems offset a portion or …

Home Bio Diesel Production

The flammability point of biodiesel.

I’ve mentioned that it’s biodegradable that it’s safe to use blah, blah, blah, all these different things, but I want to show you how safe this is. This biodiesel, I’ve made from canola oil, so I’m going to pour a little bit in here, and now it’s time to play with fire. We’re going to come down here. Light up our torch, notice I have my fire extinguisher people.

We now have a nice blow torch going. Notice I’ve got some nice biodiesel on the ground here. I want to show you that biodiesel is very, very safe to have around. I can’t light it on fire. This torch is a really hot torch. I’m actually using map gas. Map gas actually has a higher flame temperature. So I’m just trying to light this sucker on fire, and you know what, she’s not going. That’s because biodiesel isn’t actually that flammable. It has a much higher flash point than normal diesel, and I’ve just proven it.

And that’s one of the reasons people like biodiesel is because it’s so safe to use. In fact, if this stuff spills on the ground the MSDS and things that it calls for is get a garden hose and wash it off. It’s not going to light up. It’s as safe to have around as vegetable oil. No I have to cavy up that this biodiesel has been cleaned. We have got all the methanol out of it, and we’ll talk a little bit about that later, but I just want to show you that it’s very clean and it just doesn’t burn. That’s that little fun experiment. We want to show you that biodiesel will burn though. When it’s under pressure it does burn quite well. For this experiment I’m just going to start a fire, and I’m going to spray it into it. As you can see it will burn, so when it’s in your diesel and it becomes injected, it will burn beautifully. That’s biodiesel burning.

The DR Performance Diesel Products & Edge Diesel Products are both fully compatible with biodiesel- Nathan Young

GIGA Green tech visite of Kevin Koerber

Solar Camera Strap by Weng Jie » Yanko Design

This is done by making the strap solar-savvy! Meaning, adding thin solar films across the width of the strap, so as to harness solar energy when out on the field. Aptly christened the Solar Camera Strap, it’s a neat idea; …

Solar Car Race Is Underway

The American Solar Challenge is also underway, with the teams racing solar powered cars from Oklahoma to Illinois over 7 days of competition. This year is the 20th anniversary of the competition, which began with the first Sunrayce in …

re:focus house at the solar decathlon

re:focus house at the solar decathlon ‘re:focus house’ by the university of florida in madrid, spain image courtesy of the university of florida the team from the university of florida has completed the build of the ‘re: focus house’ as …

Solar-powered blimp crosses the English Channel

The blimp, everyone’s favorite steampunk mode of transportation, has gotten an eco-friendly upgrade. Solar-powered airship Nephilios represents the culmination of a years-long French project to build a completely carbon-neutral flying …

Arise, Sky Solar form joint venture for solar project EPC services …

Arise Technologies and Sky Solar (Canada) have established a joint venture to provide engineering, procurement, and contracting (EPC) services for solar PV projects under the Ontario feed-in tariff program. Under the terms of the deal, …

Bucks USA economic trends - Green technology

Can Paper Bags Substitute Plastic Bags?

Bags hold an important place in our lives. They are sometimes referred to as the best personal carriers. They are made of various stuffs like cotton, synthetic, leather and so. But when it comes to general usage like for shopping, the names of two types of bags viz. plastic made and paper made bags come to our intellect. Both are fine, but the question is, which one is the best suited to our requirements. Lets discuss the peculiarities related with the two.

You might be thinking that paper bags are not as durable as those made of plastic. Also, we see that the latter are more commonly used than the former one. But, do you know plastic is a stuff which is really hazardous to the environment. It takes thousands of year to decompose. If burnt, it emits poisonous gases which again pollutes the environment. If buried in the ground, it makes the soil infertile. If thrown in the sea, it pollutes the sea water and proves to be a threat for the life of the sea creatures. One can imagine, how hazardous is plastic to our planet.

This perilous nature of plastic had forced the governments of many cities of the world to put a ban on the use of poly-bags, which are a major source of plastic pollution. Few cities of the world in which these polythene carriers are either completely or partially banned include San Francisco, New York, Texas, Germany, Dhaka, China, Kenya and Ireland to name a few. Even the government of Delhi had issued guidelines against the use of polythene. However, later on the government changed its decision to completely ban the polythene, due to some reasons. Government suggested the manufacturers to set up the recycling units on the basis of “polluter pays principles”. But the government has not completely given up the plan to ban these polythene carriers, it is in the pipeline.

In this context, paper bags are the best option. No doubt, they are unconventional, but they are eco-friendly and easy to recycle. Nowadays, there are various types of paper made bags available in the market. They are not only good looking, but also have ample of space to carry goods and are quite durable. The handmade paper bags available nowadays are designed to suit specific requirements which include carrying gifts, carrying wine, shopping etc. There is a separate bag to serve each purpose. Although, multipurpose bags are also made from paper. They are proving to be the best substitute for plastic or polythene carriers in the modern context.

Now, as we have told you every significant fact related to plastic and paper bags, It’s upon you which one to choose. The hazardous and non-disposable polythene, or the environment friendly and elegant paper bags.

For more information on paper bags, paper baskets, miscellaneous paper products and other handicraft items, you may visit the following sites:
http://www.handmade-paper-products.com/
http://online-handicrafts-center.blogspot.com/

China also needs to get on board.

Our world is facing a huge crisis today in the form of global warming. Though most recognize that it is a bomb ticking away and awaiting to explode, few of us actually make an effort to change this dangerous trend. Lots of research and methods are being discovered and discussed but very few concrete steps have been taken yet. The major culprit is the industries that contribute maximum carbon dioxide and other dangerous gases to the environment. Although it is imperative that each of us do something to reduce our carbon footprint on earth, the industries and huge factories in the developing worlds should be forced to take up real concrete methods of curtailing pollution.

With rising population, the world has to increase production of materials and goods for all. This obviously calls for more and more industries in the world, which will only add more emitting pollutants to the atmosphere. The world needs to come together to work out solutions that can both save the environment and maintain economic development.

The problem of global warming represents a serious threat to the entire world. We are running out of time as warned by many scientists around the globe. People have created this problem by greatly increasing the greenhouse gases in the atmosphere; and people working together will be the only way to stop it.

As President Obama makes an effort to introduce and promote green enterprises and industries, he will face a startling fact. Most pollution is created by China and the developing world. So no matter how much the developed world reduces their carbon emission, countries like China will compensate it with more pollutants. The per capita emission has increased six times today thanks to industrial projects which do not follow minimum environmental laws and directives.

It is imperative that Chinese President Hu Jintao and the other world leaders start to outline a plan now that will be followed by most countries, particularly China, in going green in their business practices.

However, the problem facing the world is that if we tackle this problem from a micro level, we come face to face with industrialists who are trying very hard to make their business a success and increase profit. There is nothing wrong in that because more profit would mean greater investment and a stronger economy. But most of these factory/industrial owners do not take into account the bad effects of pollution due to the emissions and discharges from their units.

Scientists across the globe are insisting that the environmental costs should also be included in the production costs. But, unfortunately, the busy industrialists do not have time to take into account the social and environmental responsibilities of the company; and, hence, little to no effort is made by them to alter the situation. Forcing the overworked staff to look into ways to follow the green norms is not cost effective in the long run.

A better way to tackle the problem is to hire a Green Consultant. The Green Consultant would look into individual business practices and suggest concrete methods to reduce pollution and reduce wastage and improper use of resources. For a nominal fee the consultant would work throughout the year to move the business toward a successful GCI Green Building certification. However, because businesses differ in nature, region, demands, budget, etc., it would make sense that one approach for all may not work well.

Consult the Green Business League website to learn more about the consultant and their expertise.

Samm Parker is author of this article on Nationalgeographic.

Find more information about Global warming here.

AT&T Tech ChannelFor Green Computing

Fort Cherry Schools of Technology Dir.

Can You Be Legal, Clean, and Green?

You may have seen something on the news about Spokane, Washington where there is now a ban on dishwasher detergent made with phosphates. While this may seem to be an isolated case, there are actually several states (including the rest of the state of Washington) that will make dishwashing soap made with phosphates above a very small level illegal in 2010.

What is phosphate anyway and why is it used in dish washing soap?  Phosphate is an inorganic chemical that is a combination of salt and phosphoric acid.  Because it can clean things like hard water stains, and grease, phosphates are used in all kinds of things including dish washing soap. 

Why all the fuss?  Phosphate is a problem when it finds its way to freshwater rivers and lakes.  The phosphate encouraged the growth of algae which depletes the oxygen in these rivers and lakes, killing off fish and other wildlife. 

While there are green alternatives out there, deleting the phosphates from the dish washing soap can leave one unsatisfied with the resulting product-and a lot of dirty dishes.  Plus some of these green alternatives are pricier than their cheaper phosphorous counterparts.  This has caused people to travel outside their state to obtain contraband detergent from other states-which, of course, defeats the purpose of the bank in the first place. 

What should you look for in a green dish washing soap?  Are there green products that work as well?  While there is no direct substitute for phosphorous, but there are other substances that can be used.  How well they will work depends on a number of factors, perhaps the most important being the hardness of the water used for cleaning.

One ingredient that be used is a surfactants.  Surfactants are usually biodegradable and are used to provide cleaning power and increase the ability of the water to separate the soil from the dish. Anionic surfactants work well as detergents, but can be less than effective in hard water. Amphoteric surfactants are used for their foaming power and can often be found with anionic surfactants. There are other substitutes for phosphates, but these can be even more dangerous than the phosphates. They include nitrilotriacatic acid (NTA) and caustic alkaline chemicals (which are particularly dangerous when ingested-as sometimes happens with children).

It may take some trial and error to come up with the phosphate substitute that works best in your water.  It is unlikely that the ban on phosphates is going away, so it is better to start exploring the options now.  In the meantime, the soap manufacturers continue work on the perfect phosphate substitute, but there are some excellent alternatives out there.

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Also time to help you with going GREEN. http://gobewisenow.com DR Robin will help you with going green with products that do work and are safe.

The Global Warming Theory

We have all heard about Global Warming, where the planet’s atmosphere is supposedly heating up. Of course, we as common citizens have no real proof, only what our scientists tell us, along with the Think Tanks and mass media. But how can we trust this when Global Warming researchers have been paid 100s of millions of dollars, and they know if they disagree with global warming theory the money stops being funded and they are out of work?

One of the most fascinating debate points for Global Warming goes something like this; “The majority of scientists say global warming is real and we are already seeing its impact (the drought in the Western USA and the long term drought in Australia.”

This is seriously a flawed argument and let me tell you why. You see it is irrelevant and may not even be true. After all, 55% would be most of the scientists and thus the majority, still leaving a huge contingency of doubters, with plenty of data and research to back up the opposite point of view.

Likewise, during Copernicus’ day only one man believed the world was round, everyone else said it was flat; so the “majority of scientists” argument is irrelevant; majorities don’t mean anything. If you were one of a 100 people and they all jumped off a bridge because they agreed to, would you jump too? That is illogical.

Now then, the second part of the argument has to do with droughts in the world. And we all know that droughts come and go. Remember the Dust Bowl “Grapes of Wrath” in the US? And in the 1950s Australia had a drought just as bad during the same period, same as the one they are having now. This one we notice more because there are more people demanding the same amount of water.

In California, the snowpack this year is normal and anymore puts us above normal, thus, the drought theoretically is over? So, does that mean this so-called Global Warming is over? Of course, not the powers that be, behind global warming will continue to pursue this until it’s no longer in their interests. Think on this.

Lance Winslow – Lance Winslow’s Bio. If you have innovative thoughts and unique perspectives, come think with Lance; http://www.WorldThinkTank.net/.

Japan's Space-Surfing Solar Sail Photographed For First Time

Good news for the Little Japanese Solar Sail That Could, as the first images of the solar sail spread out in full deployment have been snapped. All is going according to plan, says the space agency, and “flying” looks possible.

Stion: Scaling Thin Film Solar to 100 MW

Can the Khosla-backed solar startup Stion become a serious contender in the solar world? While the company touted a $50 million investment from chipmaker TSMC yesterday, Stion has actually raised a $70 million round, and will use that …

The Advantages And Effects Of Solar Energy | Green Living Utopia

Not only people but the world in general can benefit from solar energy. Solar energy is the energy from the sun that is then taken and converted into thermal or electrical energy and it can be used to power an entire home or it could …

Uncle Sam, Solar Landlord, Is Under Fire – Green Blog – NYTimes.com

The nation’s biggest landlord – the United States government – has set the rent it will charge developers who build solar power plants on federal land, and some prospective tenants are not happy.

Obtain Solar Energy For Free â?? Important Notice ! | Green Energy …

If you’re searching for websites on how to obtain solar energy for free, then by all means, take a few moments to look over the following – it.

USA – China – A G2 For Climate and Economy?

China appears to view global warming as an economic issue, Obama’s administration is primarily focused on the current economic crisis as well, but climate change is also a serious crisis and a threat to the world’s economic system itself with all its present and predicted impacts. Don’t these global problems require an integrated economic and environmental strategy? The hypothesized summit between Barack Obama and the Chinese president, Hu Jintao, could be an important step to accelerate urgent actions needed both to face the global economic downturn and to build a solid climate pact.

China, in its last 5-year plan, sets targets to reduce national energy intensity (energy used per unit of GDP) by 20% between 2006 and the end of 2010. According to Deborah Seligsohn, China Program Director on Climate, Energy and Pollution of the World Resources Institute, this target seems to be realizable given their latest remarkable record (-1.8% in 2006, -3.7% in 2007, and -4.2% in 2008.) Last month Hillary Clinton met experts from the Asia Society and the Pew Centre for Climate Change that together wrote a report that could help the creation of this US-Chinese partnership on climate change. But the good examples from China, although not directly referred to CO2 emissions, and Obama’s ambitious plan on energy and climate will need decisions from other 13 countries (or federations such as the EU), including Russia, India, Japan to get 80% of world’s emissions “under control”. Nowadays the other 173 countries account for about 20% of total CO2 emissions, but population increase and old development patterns could dangerously increase their “pollution share” in the future: every nation will be then required to cut the CO2, but large amount of money are needed to do so. Where will our leaders take Dollars, Yuan or Euros these days?

Next steps: -264 days to COP15:
Two events along the path to Copenhagen will take place in Bonn from March 29th to April 8th: the 7th session of the AWG-KP (Ad Hoc Working Group on Further Commitments for Annex 1Parties under the Kyoto Protocol) and 5th session of the AWG-LCA (Ad Hoc Working Group on Long-term Cooperative Action under the Convention). As we can read on the UNFCCC website “this is the first of three planned negotiating sessions before COP 15 in December” and can hopefully prepare a good ground for delegations and political leaders to decide upon.

Written by Luca Marazzi on behalf of Responding to Climate Change.

For further information on Climate Change please visit the Responding to Climate Change website – http://www.rtcc.org

Article Source: http://EzineArticles.com/?expert=Luca_Marazzi

Temple Mecca Black Stone

5 Easy Tips For Saving Money and Conserving Water

Everyone is looking for ways to save money and help conserve our natural resources. There are many methods that are easy to start in your own homes, but one very simple and obvious way to save is by reducing water consumption. Here are just a few easy water saving tips that you can begin doing today.

1.  Turn off running water in your sink or shower when you’re actually using the water. You can easily fill the sink with a enough water to wash your face, or fill a cup to brush your teeth. You may consider turning off the shower faucet while you’re washing your hair and then turn on again to rinse. Think about how much water is wasted. The same goes for dishes in the kitchen, turn off the water until you’re ready to rinse.

2.  There are low-water consumption toilets available that use only a couple of gallons of water each time they are flushed. If you have a standard toilet, one green living tip you may consider is placing a plastic bottle filled with sand into your toilet tank. This little trick helps the tank fill up faster and use less water.

3.  The laundry is another area where it is easy to waste water, and just as easy to save. Do your laundry in large loads rather than several smaller ones.

4. Limit your water waste outdoors. Don’t wash your car or driveway as often as you have been, and when you do, turn off the outside faucet until it’s time to rinse your car.

5. Look throughout your home, checking the faucets, toilets and pipes for any leaks. The very smallest of drips coming from a leaking pipe can eventually cost you a lot of money. Fix any leaks that you find.

If you are looking for simple ways to save the planet and save yourself money, start at home with these 5 easy steps. The planet and your wallet will thank you.

Learn more Green Living Tips and Ideas at http://greenlivingtipsandideas.com

Bloomberg: Spain Proposing Substantial Solar Subsidy Cuts | Green …

Ah, here we go again with more subsidy cut rumors. This time it’s Spain. While rumors have been swirling for months that Spain would cut subsidies,

Greenpeace Solar Powers World Cup Festivities | BuzzFlash.org

Today villagers in Jericho, a village near Johannesburg, will gather around a specially constructed Greenpeace Solar-powered Public Viewing Area to watch South Africa’s Bafana Bafana football team play against Uruguay. …

Solar Energy Risks To Health | The Medicals

Solar energy is a potential source of free electricity and water heating. It offers the power to enjoy electrical power in remote areas of the world. It seems.

Solafrica Brings Solar Soccer To Africa

Despite the fact that the current World Cup is being held in South Africa, there are a great many folks over there who won’t be able to catch the matches, due to the inability to purchase a ticket or…

NewNet News – Hanergy becomes shareholder in Apollo Solar as they …

NewNet News – Hanergy becomes shareholder in Apollo Solar as they sign $2.55bn solar equipment deal.

China 2035 Bigger Than USA

How to Address Contaminated Land Issues

Under the relevant European Directives, an Environmental Statement is the formal product of an Environmental Impact Assessment. Environmental Statements are often organised in a way that describes the environmental baseline, mitigation and effects for each type of environmental receptors: ecology, water resources, archaeological resources, human beings etcetera. Contaminated land is often managed in the same ways as the various environmental receptor groups, although it is principally a cause of impacts rather than a receptor. It also often refers to a pre-existing condition and its damaging effect is on a variety of different receptors such as human health, structures and buildings, surface water features, groundwater features and ecology. This often means that land contamination specialists struggle with integrating the issue in a logical manner in an Environmental Statement. Sticking to the structured approach of an environmental statement is essential to ensure a clear description of the existing environmental condition, the potential impacts and the actions taken to avoid, minimise, offset or manage the impacts. This article is based on UK practice and legislation, although fundamentally the issues should be similar within other contexts.

Contaminated land is in many countries considered on a source-pathway-receptor basis. This is important to understand the impact land development can have on the issue of contaminated land. Development can interfere with any of these three elements. It can introduce sensitive receptors by changing the use of land, for instance by building new residential units on a site that was previously used for heavy industry. New pathways linking pre-existing contamination with an existing receptor can be formed, for instance when piling through a non-permeable layer connecting a layer of contaminated soils with a deep aquifer. Finally by introducing pollutants on the site a development project can introduce a potential source of contamination.

The second element to consider is the structured approach of an environmental statement. Apart from the introductory and procedural elements described in the environmental statement, a good environmental statement comprised the following sections:

• environmental baseline conditions
• potential environmental impacts
• mitigating measures
• residual environmental impacts

There should be a logical relation between the different sections. Any receptor that is affected and described in the section about the potential impacts and effects should have been introduced in the section describing the baseline. Any material impact should be assigned a mitigation or management action etc. Implementing this structure allows a clear description and understanding of the environmental impacts and the way it will be managed.

Applying these principles to contaminated land will result in a baseline condition section that describes the current sensitive receptors that are present within the potential sphere of influence of the development, the sensitivity and importance of these receptors, the presence of any pre-existing contamination and the presence of actual and potential pathways. The next section, potential environmental impacts or effects, first considers the impacts that the development will have in terms of the introduction (or removal) of sensitive receptors and the creation of new pathways between existing and potential pollution sources and receptors. In addition this section will describe the potential environmental impacts that are associated with the introduction of new sources of contamination. In the third section, mitigating measures, a description of the actions to mitigate each of the impacts that may occur should be provided. Finally a statement of the residual impact of the development is provided in the last section: residual environmental impacts.

Paul Giesberg is an environmental consultant with a special interest in environmental impact assessment and sustainability in land use development.