In the IPCC’s SR15 report that came out last year it says on page 108, chapter 2, that to have a 67 per cent chance of staying below a 1.5°C global temperature rise – the best odds given by the IPCC – the world had 420 gigatonnes of CO2 left to emit back on 1 January 2018. Today that figure is already down to less than 350 gigatonnes. With today’s emissions levels, that remaining CO2 budget will be entirely gone within less than 8.5 years.
