Primary energy sources can be classified in to two groups: nonrenewable and renewable. Secondary sources are derived from primary sources.
Energy from the ground that has limited supplies, in the form of gas, liquid or solid, are called nonrenewable resources.
Natural GasMore about Natural Gas
PetroleumMore about Petroleum
CoalMore about Coal
UraniumMore about Uranium
Energy that comes from a source that’s constantly renewed, such as the sun and wind, it can be replenished naturally in a short period of time.
HydropowerMore about Hydropower
SolarMore about Solar
WindMore about Wind
GeothermalMore about Geothermal
BiomassMore about Biomass
Energy that is converted from primary sources are secondary sources of energy. Secondary sources of energy are used to store, move and deliver energy in an easily usable form. Examples include electricity and hydrogen.
ElectricityMore about Electricity
HydrogenMore about Hydrogen