2019 has been a momentous year for the climate crisis. This year we found out just how much time we have, we saw the effects of global heating all around the world, we saw governments dither on delivering a crisis plan, and we learnt that citizens' protests are the only way to make governments halt this crisis. In the final episode of the year, host Bibek Bhattacharya looks back at the year gone by, and how the things he learnt changed him.