| Non fossil energies are commonly designated as | | | | technologies these aspects have been complicating |
| alternative energies, because often they are solutions | | | | their generalization. |
| to substitute the burning of raw fossil materials like coal | | | | Solar - The main disadvantage regards the high prices |
| and natural gas. To an exception made to the nuclear | | | | to acquire the technology, besides in order to be |
| energy these alternative energies don't get depleted. | | | | produced in large-scale it needs large open spaces. |
| Renewable energies have the big advantage of | | | | Wind energy - The initial cost of the turbines is greater |
| emitting zero pollutants to the atmosphere although | | | | than the conventional energies. The turbines cause |
| they posse some limitations. | | | | noise pollution, interferences in TV channels and can |
| Alternative energies are: | | | | upset the birds. On the other side the wind can't blow |
| Solar - Transforms the radiation from the sun into | | | | twenty-four hours a day which can cause problems in |
| energy. | | | | electricity supply. |
| Wind - Is produced from the wind currents through the | | | | Biomass - The combustion method of the biomass is |
| wind turbines. | | | | not clean, although it produces less dangerous |
| Hydraulic - It utilizes the water movement to produce | | | | pollutants than the fossil fuels. |
| electricity. | | | | Hydroelectric energy - The alteration made to the |
| Biomass - This type of energy is produced from | | | | water courses may cause the destruction of the |
| organic matter. | | | | natural habitats and harm the navigation of ships. It also |
| Geothermal - The source of this renewable energy is | | | | causes erosion of the soil, which will have impact on |
| the interior of the Planet. | | | | the local vegetation. |
| Nuclear - Is obtained by the transformation of the | | | | To conclude the alternative energies are a hope for |
| atoms core. | | | | the future of the planet but there is still a long path |
| Alternative energies also have some disadvantages, | | | | ahead to improve the existing non fossil energies and |
| mainly related with the costs and development of the | | | | to find new ones. |