| A | B |
|---|
| Coal | Non-renewable fossil fuel solid |
| Petroleum | Liquid fossil fuel |
| Natural gas | Most efficient fossil fuel |
| Solar | Uses solar panels limited use based on weather |
| Geothermal | Minerals can clog pipes hot steam and gysers |
| Nuclear | Radioactive, causes chain reactions when releasing heat energy , uses uranium |
| Wind | Non-polluting , limited use due to weather variations |
| Biomass | Created from once living material |
| Hydro-electric power | Can upset ecosystems and casue floods Power plant is in a dam |
| Tidal | Not widely used limited to areas where there are oceans |
