The UN's World Meteorological Organization said levels of the three main greenhouse gases — the climate-warming carbon dioxide, methane and nitrous oxide — all broke records last year. Such levels of heat-trapping gases will mean further temperature increases, more extreme weather and higher sea levels, the WMO said in its 19th annual Greenhouse Gas Bulletin. In 2022, carbon dioxide concentrations were at 418 parts per million, methane at 1,923 parts per billion and nitrous oxide at 336 parts per billion. Of the three major greenhouses gases, carbon dioxide (CO2) accounts for about 64 percent of the warming effect on the climate. "We don't fully understand why methane concentrations are steadily growing," said Taalas.

Source: The Hindu November 16, 2023 01:29 UTC