By European Comission, 2009.
There is growing evidence that greenhouse gas emissions from human activity are causing climate change. Over the last 100 years, the global average surface temperature has increased by 0.74°C, and sea level has risen by 17 cm during the 20th century. Current trends are projected to continue and accelerate in the coming decades. Europe will also be increasingly confronted with the impact of climate change. Climate change will come about gradually in the form of average temperature increases, with the main impacts of gradual changes being felt in the long term. However, the impact of more frequent extreme weather events will be felt in the short and medium term.
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