TO AVOID “dangerous” climate change, we must not burn more than one-quarter of our remaining reserves of fossil fuels. That’s the conclusion of the most comprehensive effort yet to work out how much carbon can be pumped into the atmosphere without pushing warming past 2 °C.
A computer modelling study led by Myles Allen at the University of Oxford and another by Malte Meinshausen of the Potsdam Institute for Climate Impact Research in Germany both point to roughly the same conclusion: humans must not emit more than 1 trillion tonnes of carbon into the atmosphere if we are to have…
