There is a lot of information that goes into understanding your carbon footprint, and Greenhouse Gas info takes it all into account, to help you we have provided some links to userful sites.
CarbonRevolution.info - Carbon Revolution is about how by analysing our Carbon Footprints and CO2 Emissions we can revolutionise the world and address the climate change emergency
Software-Limited.com - Software Limited provides carbon footprint analysis using their CO2 analysis software.
co2Analysis.com - co2Analysis provides detailed carbon footprint analysis for both products and organisations so that you can easily measure your carbon footprint and green house gas emissions.