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Renewable energies

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Renewable energies

Air Turbines near Copenhagen

Danish wind turbines near Copenhagen.

The renewable energies are all those that are obtained from elements that are not spent, and they don't finish, like the solar or the wind energy. Its utility is that they produce little or nothing of CO2, in general they doesn't impact the environment. One of its greater disadvantages is it high cost, but, according to studies, in the long term they will be every time cheaper.

There are a lot of renewable energies. Some of them are: the solar energy, wind energy and wave power.

After to have seen the description of renewable energies, with its positive and negative aspects, we can conclude that to obtain energy a country cannot be centered in only a type of source: it must be diversified, always using clean energies, to not cause a damage to the environment.

Although at the moment the renewable energies are much more expensive than the fossils, like the petroleum or natural gas. They don't have to be discarded, because, in the future, they will be much cheaper and efficient.

The countries must determine what alternative energy is more efficient according to its geography and necessity. Also they must have incentives to not use fossil fuels, like, for example, inverting in scientists to investigate and improve the clean energies that we have easy to use.

Sources

http://www.greenpeace.org /international/campaigns /climate-change/solutions /solutions_myths

http://www.greenpeace.org /international/campaigns /climate-change/solutions

http://www.ucsusa.org/global _warming/solutions/


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