Energy consumption globally is corrulated with gross national product and climate. The largest consumer of energy is US (25% of world energy) and the highest growth in consumption is in China where energy consumption will grow from 22% to 27% of world energy by 2035.
According to a recent report by BP, world energy demand will increase by 41% between 2012 and 2035 with most of this growth coming from emerging economies.
The world's energy sources are oil, gas, coal, nuclear and the renewables are hydroelectric, geothermal, wind, solar and wood.
Challenges within the energy sector are energy supply to maintain competitiveness in world economies and the effect of energy consumption on climate change.
International Energy Agency
Europe's Energy Portal