Ketan Joshi did not mean to become the manager of all things climate on Bluesky, the fast-growing social media platform that’s trying to compete directly with Twitter. GreenSky was designed to be this overarching, overall thing that encompassed all the communities. I see that emerging through the GreenSky feed, because you see people from very disparate communities talking to each other. The 39-year-old Australian expat who now lives in Oslo, Norway has spent his career writing about green energy as a communications specialist for renewable energy companies and author of Windfall: Unlocking a Fossil-Free Future, but found it especially hard to share climate information on platforms like Instagram and Twitter.