It’s undeniable that climate action is urgently needed. The risks of climate change are well evidenced. And yet somehow it can seem as though scientists’ warnings are falling on deaf ears. So what can researchers do about it? As part of a workshop on 1 October 2021, the UCL Climate Action Unit shared some brain hacks on how to help decision-makers to ‘get’ the issue. Our brains think in two qualitatively different ways: intuitive thinking and deliberative reasoning.