Environmental Protection is one of the Strategic Objectives of ICAO. Work in this area has been undertaken by ICAO since the late 1960s, first focusing on the establishment of international policies and standards related to aircraft noise, but gradually expanding to other subject areas such as local air quality and subsequently climate change.
According to most recent figures from the Intergovernmental Panel on Climate Change (IPCC), aviation (domestic and international) remains approximately 2% of global CO2 emissions produced by human activity; international aviation is responsible for approximately 1.3% of global CO2 emissions. Under ICAO’s mandate, aviation has consistently invested in better aircraft technology and the improvement in efficiency of air transport operations. Significant technological progress has been made in the aviation sector, with aircraft produced today being about 80 per cent more fuel efficient per passenger kilometre than in the 1960s.