NEW DELHI: Four key climate change indicators — greenhouse gas concentrations, a rise in sea level, ocean heat and ocean acidification — set new records in 2021, the World Meteorological Organisation (WMO) noted in its ‘State of Climate’ report released Wednesday. The last seven years, from 2015 to ’21, were globally the warmest years on record, it stated, adding the average global temperature last year was about 1.1 degree Celsius above the pre-industrial level (1850-1900).
