GCCF Netherland sector Lead by ”Okonkwu perpetua” New study reveals global air transport contributes 3.5 percent to global warming. Global air transport accounts for 3.5 percent of anthropogenic climate warming. It is also apparent that only one third of aviation’s climate change impact is due to carbon dioxide emissions and two thirds to non-carbon-dioxide effects , with contrails and the resulting cirrus clouds being the most significant factor .