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The COVID-19 global lockdown has had an "extreme" effect on daily carbon emissions, but it is unlikely to last—according to a new analysis by an international team of scientists. The study published in the journal Nature Climate Change shows that daily emissions decreased by 17% - or 17 million tonnes of carbon dioxide—globally during the peak of the confinement measures in early April compared to mean daily levels in 2019, dropping to levels last observed in 2006.