Scientists have said the atmosphere is in a state not seen for millions of years

The annual increase of atmospheric methane in 2021 was the largest in the last 39 years, according to new research

Methane concentrations tripled last year, according to new research

The combined land and ocean-surface temperature was 0.93°C above the 20th-century average, the hottest since records began 142 years ago, according to a report

While emissions dropped last year, the level of CO2 in the atmosphere rose, according to a new report