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UN Environment Programme admits 1.5°C warming limit will be breached within years

A new UN Environment Programme report concedes that global warming will surpass the 1.5-degree Celsius threshold set by the Paris climate accord within the next few years, driven by continued burning of coal, oil and gas. Current temperatures already sit around 1.4°C above pre-industrial levels based on 20-year averages, and scientists say there is no longer a realistic path to staying under the limit.

Study links methane plateau to rising NOx emissions and their southward shift

A new analysis draws on atmospheric measurement records and emission datasets to explain why global methane concentrations temporarily plateaued rather than kept rising. Researchers attribute the pause primarily to increases in nitrogen oxide (NOx) emissions and a geographic shift of those emissions toward the Southern Hemisphere, which altered atmospheric chemistry governing methane's main removal pathway via hydroxyl radicals.

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