2% of CO2 emissions and growing. The impact is higher though. It's too difficult to trawl through the original literature on mobile; Wikipedia: The IPCC has est

2% of CO2 emissions and growing. The impact is higher though. It's too difficult to trawl through the original literature on mobile; Wikipedia: The IPCC has estimated that aviation is responsible for around 3.5 percent of anthropogenic climate change, a figure which includes both CO2 and non-CO2 induced effects. https://en.m.wikipedia.org/wiki/Environmental_impact_of_aviation https://en.m.wikipedia.org/wiki/Environmental_impact_of_avia...