In Canada, there are diverse and reliable sources of energy: oil, natural gas, hydroelectricity, coal, nuclear (uranium), solar, wind, tidal and biomass. Canada is the fifth largest energy producer in the world, after Russia, China, United States and Saudi Arabia, and the eighth largest consumer of energy. Energy consumption sustains economic growth and our standard of living. Canadians are the fourth largest users of energy per person in the world. The energy sector in 2007 contributed 5.6% to the gross domestic product (GDP) and $90 billion in exports.