Emissions trading in international civil aviation | Umweltbundesamt

According to estimates of the Intergovernmental Panel on Climate Change (⁠IPCC⁠), international aviation contributes about 3.5% to global warming.1 If growth in aviation volume continues at the same rate as in the 1990s, when international aviation grew 4% annually, the contribution of international aviation to the greenhouse effect could, already in 2010, be higher than Germany's contribution to global warming.