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 is one of the most established sources and can be stored in containers, trucks, or houses. Wind energy captured through windmills can be stored in batteries. Geothermal energy from underground heat is captured through pipes and stored in the earth. Hydroelectric energy is captured using dams for storage.