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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

15 May