
Greenhouse gases reached record levels in 2023, causing temperatures to rise for years to come, the UN's weather watchdog said.
According to the World Meteorological Organization's greenhouse gas bulletin, carbon dioxide is accumulating in the atmosphere faster than at any time in human existence. Concentrations have increased by 11.4 percent in just two decades.
The increase in atmospheric CO2 in 2023 was higher than in 2022, but lower than the three years before that. It was the second largest annual increase in the last decade. Large fires and a possible reduction in carbon sequestered by forests, combined with high CO2 emissions from human activity have fueled this increase.
The organization says global average surface concentrations of CO2, methane and nitrous oxide all increased by 2023. CO2 concentrations reached 151 percent of pre-industrial levels, methane 265 percent and nitrous oxide 125 percent.
The news comes ahead of the COP29 climate summit in Baku, Azerbaijan next month. The general secretary of the Meteorological Organization raises the alarm for decision makers.
"We are clearly off track to meet the Paris Agreement's target of limiting global warming to 1.5°C above pre-industrial levels. These are more than just statistics. Any increase in temperature has a real impact on our lives and our planet," he said.
According to UN data, countries' national policies to reduce greenhouse gas emissions are not sufficient to limit global warming.
To achieve the Paris Agreement, which aims to limit warming to 1.5C, emissions must be cut by 43 percent by 2030. Current policies would see global emissions cut by 51.5 gigatonnes of CO2 by the end of the decade, just 2.6 percent less than they were in 2019.