The Act on CO2 Calculator allows the public to measure the size of their carbon footprint -- the amount of CO2 emitted by a person based on their combustion of fossil fuels.The website is part of the government's attempts to cut carbon emissions among UK households by promoting energy efficient heating, lighting and transport. Awarded the FWA site of the day for June 26th 2007 and 2008 NMA Effectiveness Award (Best use of web - Winner)