The document discusses different sources of energy that are used every day. It states that almost all energy comes from the sun originally, either directly from sunlight or indirectly from fossil fuels formed from plants and animals that absorbed solar energy millions of years ago. Specifically, it outlines that fossil fuels like coal, oil, and natural gas; solar energy captured by solar panels; hydropower from falling water; and wind power from windmills are common sources of energy, while conservation of nonrenewable fossil fuels is important.