Human activities have transformed the planet at a pace and scale unmatched in recorded history, causing irreversible damage to communities and ecosystems, according to one of the most definitive reports ever published about climate change.
Humanity is rapidly burning through the amount of pollution the world can afford to emit and still meet its warming targets, the IPCC said, and projected emissions from existing fossil fuel infrastructure will make it impossible to avoid the 1.5-degree threshold.
Failure to act now won’t only condemn humanity to a hotter planet, the IPCC says. It will also make it impossible for future generations to cope with their changed environment. “It’s not that we are depending on something that still needs to be invented,” she said. “We actually have all the knowledge we need. All the tools we need. We just need to implement it.”
The pledges are far from sufficient to fulfill the goals of the Paris agreement, the IPCC says, and most nations are not on track even to meet even those targets. Countries must cut their greenhouse gas emissions by almost half before 2030 for the world to have a 50-50 chance of limiting warming t0 1.5 degrees, the report said.
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