Overshooting 1.5°C is risky – that’s why we need to hedge our bets

By Carl-Friedrich Schleussner, Research Group Leader, International Institute for Applied Systems Analysis (IIASA)
Gaurav Ganti, PhD Candidate in Geography, Humboldt University of Berlin
Joeri Rogelj, Director of Research and Lecturer - Grantham Institute Climate Change & the Environment, Imperial College London

The global response to climate change has gained momentum since the 2015 Paris agreement, yet it remains inadequate to meet the scale of the challenge. That agreement established the goal of holding global warming to well below 2°C, and to pursue efforts to limit it to 1.5°C. To achieve this, greenhouse gas emissions should peak and decline as soon as possible.

The latest reports of the UN Environment Programme, the International Energy…

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