Buildings account for 40% of the total energy consumption of the EU and they are one of the most significant sources of greenhouse gas emissions (36% of the EU total). In order to achieve the 2050 EU building sector target, the energy performance of existing buildings will need to be improved substantially.
As new technologies go, wind has enjoyed 3 decades of continuous innovation, performance and reliability improvements and falling costs – benefits of economies of scale, technological advancements and learning by doing. The law of diminishing marginal returns, however, appears to have gotten in the way of further cost reductions.
Wind energy has been developing very quickly in the past years. Installation of wind turbines grew at an annual average rate of 30% between 2000 and 2009 and global installed capacity now represents 238 GW, of which 62 GW are in China, making it the largest wind energy provider worldwide. As a result, a significant fraction of electricity is now produced by wind in certain areas (e.g., 6% in the European Union, 3% in the USA).
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