Burning fossil fuels is a major contributor to climate change. However, these materials continue to be our major source of energy and they dominate the global energy system. A new study published in the Nature journal has assessed the quantity of fossil fuels that need to be left in the ground, both regionally and globally, to allow for a 50 per cent probability of limiting warming to 1.5 °C. But, is it actually feasible to do so? Listen in.