What is aviation’s impact on Global Warming?
Fuel used by aircraft engines results in carbon dioxide and other substances being released to the atmosphere. Carbon dioxide contributes directly to the greenhouse effect. While other substances emitted (e.g. nitrogen oxides and water vapour) contribute to global warming, their exact impact is still not known. Aviation is responsible for an estimated 2% of global carbon dioxide emissions. The best estimate of aviation’s climate change impact is about 3.5% of the total contribution by human activities.
