| A | B |
|---|
| Fossil Fuels | An energy-rich substance (such as coal, oil or natural gas) formed from the remains of organisms. |
| Solar energy | energy from the sun |
| Renewable resources | A resource that is naturally replaced in a relatively short time. |
| Non-renewable resources | A natural resource that is not replaced as it is used. |
| Contour plowing | Plowing fields along the curves of a slope to prevent soil loss. |
| Crop rotation | The planting of different crops in a field each year. |
| Hydroelectric energy (power)- | Electricity produced by the kinetic energy of water moving over a waterfall or dam. |
| Wind energy | energy generated from wind. |
| Soil conservation | The management of soil to prevent its destruction. |
| Energy conservation | The practice of reducing energy use. |
| Biomass fuels | Fuel maked from things that once were alive. |
| Geothermal energy | Heat energy in Earth's interior from water or steam that has been heated by magma. |
