ENERGY
Solar
    Photovoltics
        Solar Cells
        Solar Panels
    Wind
        Turbines
        Mills
    Plants
        Food
        Bio-Fuel
        Algae
        Fossil Fuel
            Crude Oil
            Coal
            Natural Gas
            Tar Sand
            Oil Shale
    Heat & Light
    Hydropower
Nuclear
    Fission
    Fusion
        Cold Fusion
        LENR
Geothermal
    Hot (300-700F)
    Medium (68-300F)
    Heat Pumps
Power Plants

Alternative
Natural
Green
Free
 
 

FOSSIL FUELS (crude oil, coal, natural gas, tar sand, oil shale)

Fossil fuels were also originally created through plants using solar energy.  Fossil fuels are formed under heat and pressure from plants and animals (both herbivory and carnivore) that died a long time ago (some say millions or billions of years ago).