Scientists are calling on world leaders to sign up to an eight-point plan of action at landmark talks in Paris.

The key element is the goal to limit global warming to below 2C by moving to zero carbon emissions by 2050. The UN meeting in December is "the last chance" to avert dangerous climate change, according to the Earth League. Scientific evidence shows this can be achieved, but only with bold action now, says an alliance of climate researchers from 17 institutions.

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