 Most Chadians burn biomass fuels such as wood and animal manure for power.ExxonMobil leads a consortium of Chevron and Petronas that has invested $3.7 billion to develop oil reserves estimated at one billion barrels in southern Chad.Oil production began in 2003 with the completion of a pipeline (financed in part by the World Bank) that links the southern oilfields to terminals on the Atlantic coast of Cameroon.