I worry that pleas from climate scientists to tackle climate change are often ignored. So it's reassuring when such a world-renowned figure as the Pope speaks out against climate change.
In his 184-page letter, Pope Francis explains the scientific evidence that humans are warming the planet. He's also not shy of criticising our prevailing economic system, which he sees as putting profit before the planet.
While I personally think the Pope is not an authority on scientific matters, I hope his reach means people take climate change more seriously.