Researchers from the University of Exeter, the University of East Anglia (UEA), the CICERO Centre for International Climate Research and Stanford University conducted the analysis of carbon pollution across the world.
The rapid rise could be a temporary result from stimulus packages that focused on industry, such as in China where emissions continued to rise during 2020 and drove an increased use of coal.
Professor Corinne Le Quere, from UEA, described the findings as a"reality check" on the need for rapid action by countries to deliver bigger greenhouse gas emissions cuts to keep the globally agreed 1.5C warming limit within reach. They also suggest the world needs to cut carbon dioxide emissions by around 1.4 billion tonnes a year - compared with the 1.9 billion tonne drop in pollution caused by the pandemic.
The figures for some of the world's biggest emitters show that China's emissions are projected to rise 4% compared with 2020, up 5.5% on 2019 levels, to contribute 11.1 billion tonnes or 31% of global carbon emissions.
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