The Earth's climate has changed throughout history, but what we see in the last decades is uncomparable to any development before. In mid-2012 the athmospheric carbon level excessed for the first time 400 CO2 parts per mio. "Scientific evidence for warming of the climate system is unequivocal", says Intergovernmental Panel on Climate Change. The evidence for rapid climate change is compelling: I.e. Global sea level rose about 17 centimeters (6.7 inches) in the last century. The surface temperature analysis shows that Earth has warmed since 1880, with the 10 warmest years having occurred in the past 12 years. Extreme events increase. According to the National Oceanic and Atmospheric Administration, there were only ion he US a record twelve weather disasters costing more than $1 billion in 2011. The strategies to meet this are mitigation – that means reduction and prevention of greenhouse gases output - and adaptation – that means measures to adapt to the inevitable global warming.

Klimawandel

Der Klimagipfel in Durban im Dezember 2011 hat wieder keinen entscheidenden Durchbruch für den Klimaschutz gebracht. Gleichzeitig steigt der weltweite Ausstoß von Kohlendioxid trotz Wirtschafts- und Finanzkrise weiter an. Selbst Optimisten sind mittlerweile skeptisch, ob der Anstieg der globalen Durchschnittstemperatur noch auf zwei Grad begrenzt werden kann. Diese Schwelle gilt Experten als gerade noch kalkulierbar.

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