Many personalities and experts have welcomed the drop in CO2 emissions, due to the slowdown in economic activity. However, this has had no effect on the climate. It was revealed by a study published in the scientific journal Nature Climate Change. Its authors believe that this unprecedented decrease will be of no use to slow down global warming.
The decline could well be insignificant in the absence of a systemic change in energy and diet, its authors warned. They calculated how 10 different greenhouse gases had been affected in 120 countries between February and June 2020.
CO2 or nitrogen oxides, for example, decreased between 10 and 30 percent. But these “major changes in behavior” are temporary and will only save 0.01 ° C of warming by 2030, according to the study.
“Without structural change, we will not succeed”, argued Piers Forster, co-author of the study and director of the Priestley International Climate Center at the UK University of Leeds.
To meet the ideal target of the 2015 Paris Agreement, which aimed to limit global warming to + 2 ° C, the UN estimated that CO2 emissions should be reduced by 7,6 percent per year each year between 2020 and 2030. This figure is similar to the drop this year, due to the Coronavirus pandemic.