Thanks for the question. If you click on the Following below the profile it lists which accounts this account follows. On a daily basis posts are scanned for relevance to Climate issues and selected to be boosted. There are a few reflector accounts in the list, but most are native Mastodon/Fediverse. Today IEA (which is indeed a Twitter bot) had a lot of posts which were deemed relevant. It is not usually the case. If you do not want to see any particular account you can also block it.