What is the single greatest threat to life on Earth? > life on earth. John Baillie Related postsClimate protestsMarch 20, 2019PresentationsMarch 26, 2019prostitutionOctober 9, 2018 Previous posthttps://www.theguardian.com/lifeandstyle/2015/jan/14/love-is-getting-answers-right-to-36-questionsNext postwar