| A | B |
| Solar Heating | Using the sun to heat and light our buildings |
| Solar hot water | A flat-plate collector allows you to have hot water |
| Windmill | Used for pumping water or grinding grain |
| Geothermal Electricity | When steam rotates a turbnine that activates a generator, it produces geothermal electricity |
| Geothermal reservoirs | Are found a couple of miles beneath Earths surface can be used to produce heat |
| biomass | Heat can be used to chemically convert biomass (garbage) into a fuel oil |
| biofuels | when biomass is converted directly into liquid fuels, it is called biofuel |
| Biopower | biopower is the use of biomass to generate electricity |
| Geothermal Heat Pumps | geothermal heat pumps keep buildings heated or cool by pumping heat from the earth's upper crust |
| Hydropower | Flowing water creates energy that can be captured and turned into electricity. |
| Ocean energy | This is energy produced by the ocean |
| Thermal energy | Energy from the suns heat |
| Mechanical energy | Energy from the ocean's tides and waves. |