London — Emissions need to be halved by 2030 to limit warming to 1.5°C but temperatures are on track to reach double that by the end of the century even if countries’ current plans are fully implemented, research by scientists shows.

Climate Action Tracker, a group of European researchers, tracks countries’ progress towards the globally agreed aim of limiting warming to well below 2°C and a more ambitious target of 1.5°C...

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