| Solar Energy - Our sun is the greatest source of | | | | expensive to build the dams. |
| energy we know about it today, it comes to us | | | | Tidal Energy - Tidal energy work much in the same |
| freely and is efficient. It is very possible that solar | | | | way as hydroelectric energy, but on a smaller scale, |
| power can replace traditional electricity sources in | | | | and it uses the natural tides of the ocean. There are |
| many places, especially where there is abundant | | | | several drawbacks though. Because of the |
| sunshine. Unfortunately not all places are ideal for | | | | sometimes violent and unpredictable nature of the |
| solar power. In the areas at high latitude there is not | | | | ocean, they can not be constructed in many places. |
| enough sunlight in a day to produce efficient energy, | | | | So far only about 9 places have been identified to |
| and the same for places where it rains a lot. | | | | build this kind of power plants. And these power |
| Wind Energy - Wind is very efficient at producing | | | | plants can have a negative impact on migratory birds |
| electricity. Obviously you need a lot of wind, like | | | | and also fisheries. |
| along coast lines and at high altitudes. Wind power | | | | Biomass - Biomass can be used to produce an alcohol |
| could replace up to 20% of our total electric | | | | that is comparable to coal and can be used to |
| consumption in the foreseeable future. Wind is a | | | | replace our gasoline needs. The biomass may consist |
| clean source of energy with none of the harmful | | | | of fermented animal waste, agricultural crops, grains |
| byproducts like carbon dioxide. However the huge | | | | and other natural products. However, using the |
| blades of the windmills do pose a danger to birds and | | | | resulting fuel still produces greenhouse gases. |
| you need a lot of room to build a sufficient number | | | | Other forms of energy such as fusion, geothermal |
| of windmills. | | | | and nuclear power can power the world, but they all |
| Hydroelectric Energy - This type of power is mainly | | | | have some negative impact on the environment. |
| sourced from dams. The production of electricity | | | | It seems all forms of alternative energy have some |
| from the water movement is clean and it does not | | | | drawbacks, but they all are better options to replace |
| produce waste material. However, the ideal type of | | | | our current dependency on coal and oil. |
| places to build this is very limited and it is very | | | | |