AJ Sadauskas"For soon, the ambitious Paris agreement limit turned out to be not much of a limit at all. When the Intergovernmental Panel on Climate Change (or IPCC, the world’s foremost body of climate experts) lent its authority to the 1.5°C temperature target with its 2018 special report, something odd transpired.
"Nearly all modelled pathways for limiting global heating to 1.5°C above pre-industrial levels involved temporarily transgressing this target. Each still arrived back at 1.5°C eventually (the deadline being the random end point of 2100), but not before first shooting past it.
"From some corners of the scientific literature came the assertion that this was nothing more than fantasy. A new study published in Nature has now confirmed this critique. It found that humanity’s ability to restore Earth’s temperature below 1.5°C of warming, after overshooting it, cannot be guaranteed. Many impacts of climate change are essentially irreversible."
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