Nuclear: Nuclear energy is made by splitting uranium atoms that produce heat, which is used to boil water for steam to drive turbines. Uranium is mined from certin rocks. Nuclear energy is efficient, but dangerous because radioactive byproducts are produced and not easily disposed of, and meltdowns can occur.

Geothermal: Geothermal energy is created when water comes into contact with heated rocks underground creating steam. Drilling into the rock releases the trapped steam which is then used to power turbines. Geothermal energy is nonpolluting.