Rather than an endlessly reheated nuclear debate, politicians should be powered by the evidence | Adam Morton

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Raising Warragamba Dam probably can’t stop floods. There’s a simpler solution closer to home

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Australia’s best photos of the month – October 2022

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Growing together: how city farms have nurtured a generation of urban kids

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Giant steps: why walking in nature is good for mind, body and soul

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Greenpeace accused of greenwashing Egypt’s image ahead of Cop27

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Cop27 climate summit: window for avoiding catastrophe is closing fast

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Will disruptive action help save the planet? | Rupert Read and Indigo Rumbelow

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‘It’s got nasty’: the battle to build the US’s biggest solar power farm

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The Observer view on Rishi Sunak’s shameful decision not to attend Cop27 | Observer editorial

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