»Eine globale Erwärmung um 1,5 Grad könnte schon in den 2030er Jahren überschritten werden«

Observed increases in well-mixed greenhouse gas (GHG) concentrations since around 1750 are unequivocally caused by human activities. Since 2011 (...), concentrations have continued to increase in the atmosphere, reaching annual averages of 410 ppm for carbon dioxide (CO2),1866 ppb for methane (CH4), and 332 ppb for nitrous oxide (N2O) in 20196. Land and ocean have taken up a near-constant proportion (globally about 56% per year) of CO2 emissions from human activities over the past six decades, with regional differences (high confidence) (...)

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