Most of the UN climate science panel's projections for greenhouse gas emissions do not forecast beyond two trillion tonnes of carbon, more than enough to unleash a crippling maelstrom of rising seas, drought, heat waves and floods
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Using up all known fossil fuel reserves would render Earth even more unliveable than scientists had previously projected, researchers said on Monday.
Average temperatures would climb by up to 9.5 degrees Celsius (17 degrees Fahrenheit)—five times the cap on global warming set at climate talks in Paris in December, they reported.
In the Arctic region—already heating at more than double the global average—the thermometer would rise an unimaginable 15 C to 20 C.