Hey chris this actually sounds like a good idea. Considering the studies on reclamaition currently being undertaken to find a way of neutralising the waste emissions from active sites. This, combined with the capture and refinement of waste gases from these active sites could be a lot better if some time was spent on it than simply allowing it to escape and pollute or as current proposals go capturing it and burying it under the North Sea. If you contact the Department for Trade and Industry in the UK with a detailed proposal of uptake rates, bi-products and volumes required then the feasibility studies can be carried out to determine if "treatment works" where these plants would be grown could be useful or cost effective as a mean of removing pollutants from the atmosphere. If you need the number just request it from one of the labour info .gov sites and they will pass it on to you. There is a lot of work to do though.
Carry on
