From what I've seen, hopeful eco-stories get more traction online.
Lots of people say to use scary climate facts, but my posts about local green wins do better. I think the algorithm likes when people chat and share good news.
Except when it doesn't. Look at how fast bad news travels too. Think about all the doomscrolling we do. A celebrity scandal blows up in hours, but a feel-good story might take days to catch on. Remember that video of the dog saving a kitten? It went viral, but so did that political meltdown last week. It's more about shock value than just good vibes.