The International Energy Agency (IEA), based in Paris, is an autonomous agency linked with the Organization for Economic Cooperation and Development (OECD). Notable publications include the World Energy Outlook, which assesses current energy conditions and projects energy demand, energy supply and CO2 emissions for 20 to 30 years into the future. World Energy Statistics contains up-to-date data on the supply, transformation and consumption of all major energy sources. Energy Balances of OECD Countries contains data on the supply and consumption of coal, oil, gas, electricity, heat, renewables and waste, presented as comprehensive energy balances expressed in million tonnes of oil equivalent. Historical tables summarize production, trade and final consumption data as well as key energy and economic indicators. A companion volume—Energy Statistics of OECD Countries—presents corresponding data in comprehensive balances expressed in a common unit, million tonnes of oil equivalent. The IEA charges a fee for access to most of its data, similar relevant data might be available for free from the U.S. Energy Information Agency (Energy Information Administration (EIA), United States).