Negative Emission Technologies User LearningHistoryIsFun, in the Sherman McCoy's Emporium subreddit, 25 Mar 2021
Negative-emissions technology portfolios to meet the 1.5 °C target User bylaurelchristine, in the ElonMuskXprize subreddit, 03 Mar 2021
Negative-emissions technology portfolios to meet the 1.5 °C target | Global Environmental Change User Martin81, in the ProjectVesta subreddit, 24 Feb 2021