Worldwide CO2 emissions from commercial flights are rising up to 70% faster than predicted by the UN.
Carbon dioxide emitted by airlines increased by 32% from 2013 to 2018, according to a study by the International Council on Clean Transportation.
The study shows the UK is responsible for 4% of global aviation CO2 emissions, behind only the US (24%) and China (13%).
Although aviation accounts for just over 2% of all global emissions, that proportion is expected to expand significantly as other sectors such as energy make more rapid progress to decarbonise.
A forecast released by Airbus on Wednesday said the number of commercial aircraft in operation would double to 48,000 planes worldwide by 2038. It predicted urbanisation and an emerging 'middle class' would fuel rapid growth, particularly in the Asia-Pacific.
The growth in total emissions comes in spite of more fuel-efficient planes, as passenger numbers have grown.