Renewable energy or green energy is energy which comes from natural resources such as sunlight, wind, rain, tides, and geothermal heat, which are renewable (naturally replenished). 

Source: http://en.wikipedia.org/wiki/Portal:Renewable_energy

Click the following link to download a global status report:

REN21 (2011). "Renewables 2011: Global Status Report". 

Florian Engel - Green Energy Consultant