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Scientists confirm record highs for three most important heat-trapping gases

by admineconai April 8, 2024
written by admineconai April 8, 2024
618

US scientists have confirmed that the levels of the three most important heat-trapping gases in the atmosphere reached new record highs again last year, underlining the escalating challenge posed by the climate crisis.

According to the scientists, the global concentration of carbon dioxide, the most important and prevalent of the greenhouse gases emitted by human activity, rose to an average of 419 parts per million in the atmosphere in 2023 while methane, a powerful if shorter-lasting greenhouse gas, rose to an average of 1922 parts per billion.

Levels of nitrous oxide, the third most significant human-caused warming emission, climbed slightly to 336 parts per billion.

According to the National Oceanic and Atmospheric Administration (Noaa), the increases do not quite match the record jumps seen in recent years, but still represent a major change in the composition of the atmosphere even from just a decade ago.

Through the burning of fossil fuels, animal agriculture and deforestation, the world’s CO2 levels are now more than 50% higher than they were before the era of mass industrialization. Methane, which comes from sources including oil and gas drilling and livestock, has surged even more dramatically in recent years, Noaa said, and now has atmospheric concentrations 160% larger than in pre-industrial times.

Read also: Report: Nearly half of US prisons draw water likely contaminated with toxic PFAS

Noaa said that the onward march of greenhouse gas levels was due to the continued use of fossil fuels, as well as the impact of wildfires, which spew carbon-laden smoke into the air. Nitrous oxide, meanwhile, has risen due to the widespread use of nitrogen fertilizer and the intensification of agriculture.

“As these numbers show, we still have a lot of work to do to make meaningful progress in reducing the amount of greenhouse gases accumulating in the atmosphere,” said Vanda Grubišić, director of Noaa’s global monitoring laboratory.

The increasing presence of greenhouse gases is spurring a rise in global temperature – last year was the hottest ever measured worldwide – and well as associated impacts such as floods, droughts, heatwaves and wildfires.

It is also pushing the world into a state not seen since prior to human civilization. Carbon dioxide levels today are now comparable to what they were around 4m years ago, Noaa said, an era when sea were around 75ft higher than they are today, the average temperature was far hotter and large forests occupied areas of the now-frozen Arctic.

Story was adapted from the Guardian.

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