Communities from across the Niger Delta, with the support of Environmental Rights Action/Friends of the Earth Nigeria (ERA), have filed a legal action against the Nigerian government, the Nigerian National Petroleum Corporation and the Shell, Exxon, Chevron, Total and Agip joint venture companies to stop gas flaring. More gas is flared in Nigeria than anywhere else in the world, and flaring in the country has contributed more greenhouse gas emissions than all other sources in sub-Saharan Africa combined according to the World Bank.