 Complete the following phrase:  Since the industrial revolution, the burning of coal, oil and gas has released millions of tonnes of carbon dioxide, methane, and other greenhouse gases into the atmosphere, causing global warming. By 2020, the Earths average temperature had risen by over 1C since pre-industrial levels. The United Nations Intergovernmental Panel on Climate Change has calculated that continuing to burn coal, oil, and gas reserves will heat the planet by between 0.8 degrees to 2.5 degrees, per 1000 gigatonnes of burning carbon and there are 2900 gigatonnes of carbon in proven reserves. Burning a fraction of the coal, oil, and gas reserves will therefore lead to uncontrollable planetary heating, resulting in widespread crop failures, and the 6th mass extinction event. By the end of 2019, there had been increasing incidents of wild fires in Australia, 