Tehan and Ley to reveal Liberals’ net zero emissions position tomorrow – as it happened

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• Liberals poised to dump net zero target after majority reject policy in marathon five-hour meeting

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Removing CO₂ from atmosphere vital to avoid catastrophic tipping points, leading scientist says

Removing carbon from the atmosphere will be necessary to avoid catastrophic tipping points, one of the world's leading scientists has warned, as even in the best-case scenario the world will heat by about 1.7C.