The global response to the Covid-19 pandemic has driven the biggest annual fall in CO2 emissions since World War Two, say researchers.
Their study indicates that emissions have declined by around 7% this year.
France and the UK saw the greatest falls, mainly due to severe shutdowns in response to a second wave of infections.
The decline in carbon in 2020 has dwarfed all the previous big falls.
According to the Global Carbon Project team, this year saw carbon emissions decline by 2.4 billion tonnes.