Emissions from aviation sector were 0.74 GtCO2e in 2005 (around 2.0 to 2.5% of the total annual global CO2 emissions)i and are one of the fasted growing emissions sources, with projections indicating that the emissions could range from 1.36 to 3.26 GtCO2e by 2050. Further, apart from CO2 emissions, aviation operations result in other GHG emissions, estimated impact of which could be about 2 to 4 times greater than those of CO2 alone.

Aviation sector has significantly lagged behind in addressing its emission, compared to other sectors covered under national GHG emissions, especially in developed countries that have taken on binding obligations under the Kyoto Protocol.

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