‘We’re doomed’: a common refrain in casual conversation about climate change. It signals an awareness that we cannot, strictly speaking, avert climate change. It is already here. All we can hope for is to minimise climate change by keeping global average temperature changes to less than 1.5°C above pre-industrial levels in order to avoid rending consequences to global civilisation. It is still physically possible, says the Intergovernmental Panel on Climate Change in a 2018 special report – but ‘realising 1.5°C-consistent pathways would require rapid and systemic changes on unprecedented scales’.