Dr Anne Marie Tosolini, Paleobotanist Melbourne University: “I think climate change is actually the biggest threat humanity has ever faced and it’s an interesting threat because it’s something we have to do all together. In terms of pollution, for example, if you have bad pollution in one country, then one country can decide that’s not good for us and they change their policies and then it will be fixed. In this case, a whole human species has actually to cut emissions. The faster the better.”

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