Greenhouse Gas emissions accounting for investment lending is a corporate mandate of the World Bank following the WBG Environment Strategy. Accounting for GHG emissions allows the World Bank and its clients to estimate the impact of projects on GHG emissions early in the project cycle. This knowledge can help task teams and client countries mainstream climate change mitigation action in the project design, and thus is a key step in managing and reducing GHG emissions in a cost-effective manner. By undertaking GHG accounting collaboratively with the World Bank, the client countries are also better positioned in emerging climate frameworks, where GHG accounting is an essential information. The World Bank has initiated GHG accounting in the forestry, energy, agriculture, transport, water and urban sectors starting July 2013. This e-learning course is based on the 2012 Greenhouse Gas Analysis report of the World Bank and is designed to assist WB staff understand key concepts involved in GHG accounting. The course will be the foundation on which WB staff can build and move to their own sector GHG accounting courses.