The nowadays world experiences an energy transition. At the time when greenhouse gases amounts culminate in the atmosphere, the world governments gradually come to awareness that action against global warming has become compulsory.
Therefore, in order to counteract the current trend, the European Union flags up ambitious targets for 2020: increase the renewable energy share by 20% of the energy consumption, decrease greenhouse gas emissions by 20% in comparison with 1990, and save 20% energy.
The United States recently joined the trend with declared 32% greenhouse gas emission reduction targets in connection with electricity production compared with 2005.
In this context, usual energy sources are facing their limits: fossil fuels generate massive amounts of greenhouse gases and hence public health issues, the nuclear has to cope with radioactive refuse and nuclear plants safety. Eventually, hydroelectric energy reaches the saturation stage.
Offshore wind energy brings a new momentum to the wind energy industry by opening up new perspectives. Setting up wind farms away offshore considerably reduces visual and noise nuisance while exposing the turbines to winds stronger and more constant than onshore.

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