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Interactive content: Upgrade your browser for the full experience. Alternatively, click here for a list of climate change terms and what they mean. -. 1.5 degrees. Keeping the rise in global average temperature below 1.5 degrees Celsius will avoid the worst impacts of climate change, scientists say. That’s compared with ‘pre-industrial’ times. The world has already warmed about 1C since then. -. 2 degrees. The original target for limiting the rise in global average temperature. Recent research points to 1.5 degrees being a far safer limit. -. 3 degrees. The current likely rise in average global temperature by the year 2100 if countries keep their promises to cut emissions of greenhouse gases, which are driving climate change. Full story

9 May