The energy we use can be divided into two groups.

Renewable and non-renewable. Types Of Renewable Energy Solar Park and Wind Farm – Image by Erich Westendarp from Pixabay Renewable energy accounts for about 21% of global electricity generation and about 12.5% of overall energy consumption.

There are five main renewable energy sources: Solar – energy obtained from the sun Geothermal – energy harnessed from heat within the earth Wind – energy harnessed from the natural movement of air Biomass – energy obtained from living matter, usually from plants Hydropower – energy obtained from flowing water In the United States, biomass accounts for about half of all renewable energy and 5% of total US energy consumption.

The main biomass fuel is ethanol, which is a clear, colorless alcohol produced mostly from grains or sugar.