World set to breach 1.5C climate limit as UN urges rapid reversal

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🗞️ Driving the news: The UN Environment Programme said Wednesday the world will breach the 1.5°C limit within the next few years
• Average global temperatures have already risen roughly 1.4°C above pre-industrial levels, and current national policies put the planet on track for around 2.6°C by century's end
• UNEP argues temperatures could eventually be brought back down through sharp emissions cuts combined with carbon dioxide removal

🔭 The context: The 1.5°C threshold is the more ambitious goal countries agreed to pursue under the 2015 Paris Agreement, alongside keeping warming well below 2°C
• UNEP now advocates an "overshoot, peak and decline" pathway, limiting how far temperatures rise above 1.5°C, holding that period as short as possible, then reversing
• Lead author Debra Roberts identified roughly 1.8°C as the practical maximum from which a return to 1.5°C remains feasible
• She asserts that response feasibility becomes seriously questionable as the report itself describes the approach as neither acceptable nor preferred, but the best remaining option

🌍 Why it matters for the planet: Every fraction of a degree and every year spent above 1.5°C raises exposure to hazards and the risk of irreversible damage, more frequent and severe heatwaves, floods and wildfires, faster melting of glaciers and polar ice, rising seas
• Warming near 1.8°C would trigger irreversible cascading changes, meaning the overshoot period permanently reshapes ecosystems regardless of what temperatures do afterwards

⏭️ What's next: Carbon removal through afforestation or direct air capture is recommended to supplement rather than substitute for cutting residual emissions, and current industrial removal capacity is extremely limited
• The report also urges overshoot-calibrated adaptation planning now, given that adaptation takes decades to build

💬 One quote: Once warming exceeds 1.5°C, "there are no good outcomes" — Inger Andersen, UNEP Executive Director, who added that the target remains the goal

📈 One stat: Around 2.6°C of warming by 2100 under current national climate policies and trends

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