evidence: Atmospheric levels of the three main greenhouse gases warming our planet - carbon dioxide, methane and nitrous oxide- all reached new record highs in 2021, according to a new report from the UN’s World Meteorological Organization (WMO). [...] The increase in carbon dioxide levels from 2020 to 2021 was also larger than the average annual growth rate over the last decade, and according to WMO, the levels continue to rise through 2022. [...] To be more specific, CO2 concentrations last year reached 415.7 parts per million (ppm), methane 1908 ppm, and nitrous oxide 334.5 ppm. These values constitute, respectively, 149 per cent, 262 per cent and 124 per cent of pre-industrial levels before human activities started disrupting the natural balance of these gases in the atmosphere.