The document discusses several sources of energy:
Fossil fuels like petroleum, coal, and natural gas are extracted through drilling or mining and can be stored in containers. Solar energy from the sun is captured through solar panels and can be stored in batteries. Biomass energy from burning wood or making biofuels can be stored in containers, trucks, or barrels. Wind energy is captured through windmills and stored in batteries. Geothermal energy from the earth's heat is captured through underground pipes and stored in the earth.