| Renewable Energy Sources | Ultimate Source of the Energy | Uses |
| Solar | Nuclear fusion in the Sun | Space Heating, cooking, drying, electricity, cooling, growing plants, solar toilets, hot water, light |
| Wind | Uneven heating of the Earth's surface by the Sun, and also kinetic energy from Earth's rotation | Sailing, electricity, drying, cooling, water pumping, wind mills, irrigation |
| Geothermal | Nuclear fission inside the Earth | Electricity, heating |
| Biomass | Solar Energy via photosynthesis | Food for people, electricity (landfill gas, wood gasification plants), heating (firewood), alternative fuels (ethanol, methanol) |
| Hydro | electricity, grinding grain |