A carbon footprint assessment is a tool that can help us to measure and manage greenhouse gas emissions (GHGs). Carbon footprinting can determine the impact of an entire supply chain, through making products, running organisations, constructing buildings, and providing services. A robust carbon footprint would conform to international standards such as the PAS 2050 from the British Standards Institute (BSI), the GHG Protocol for Products from the World Resources Institute (WRI), the French Grenelle method, or other internationally recognised methods.