Improving the environmental performance of aviation is a challenge ICAO takes very seriously. In 2004, the 35th Session of the ICAO Assembly adopted three major environmental goals, which have been reaffirmed in all subsequent Assembly Sessions:

  a. to limit or reduce the number of people affected by significant aircraft noise;

  b. to limit or reduce the impact of aviation emissions on local air quality; and

  c. to limit or reduce the impact of aviation greenhouse gas emissions on the global climate.