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Climate change – five minutes before midnight

Speaking recently in Delhi, Rajendra Pachauri, the head of the UN’s Intergovernmental Panel on Climate Change (IPCC) said that the world was running out of time to tackle the threat of uncontrolled climate change, saying “we have five minutes before midnight.” Dr Pachauri said that humans were pushing the world’s climate system to the brink, […]

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Mauna Loa record, showing steady rise of CO2 concentrations since 1960 © Scripps Institution of Oceonography

Why ‘400ppm’ is a number we should all care about

Over recent weeks, climate scientists and environmentalists have been carefully watching the output from a remote data collection point in Mauna Loa, Hawaii, which measures the volume of carbon dioxide in the Earth’s atmosphere. And now we’ve heard confirmation that levels have reached 400 parts per million – the highest since the Pliocene era which finished 3 million years ago.

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