World Scientists' Warning to Humanity: A Second Notice (15,364 signatories - 2017) User Pi31415926, in the Fixing the Earth, one ecosystem at a time. subreddit, 23 Jul 2021
World Scientists' Warning to Humanity: A Second Notice (15,364 signatories - 2017) User Pi31415926, in the Deep Green subreddit, 23 Sep 2019
In November 2017, 15,364 world scientists signed a Warning to Humanity calling for, among other things, promoting dietary shifts towards mostly plant-based foods User Lif3Breath, in the /r/Vegan - the largest vegan community online! subreddit, 09 Sep 2018
World Scientists Warning to Humanity: A Second Notice | Bioscience (academic.oup.com, December 2017) User UltraMegaMegaMan, in the Collapse of Civilization subreddit, 12 Mar 2018