COP26: Fear of failure on final day, and just how green was summit?

The number of people who flew to the summit in private aircraft has drawn criticism. According to the International Air Transport Association, about 2% of global carbon emissions are caused by aviation. It also creates non-CO2 emissions high above the ground, which can have an additional warming effect. A return economy class flight from London to New York will emit 0.67 tonnes of carbon dioxide per passenger. This is equivalent to 11% of annual UK emissions, and about the same amount as the CO2 produced by Ghanaians over the course of a year.