“In 2020, a major study from Brown University analysed millions of tweets. They found that bots were responsible for roughly 25 per cent of all tweets about climate change. On days with big climate announcements, bot activity surged even higher, promoting denialist talking points and generating the illusion of a massive, angry public consensus against climate action.”
The study: Marlow et al. 2021 https://www.tandfonline.com/doi/full/10.1080/14693062.2020.1870098
Article about it: https://www.theguardian.com/technology/2020/feb/21/climate-tweets-twitter-bots-analysis

