Here's a list of Indiana environmental groups that have accounts on BlueSky. Not all are active, but it's a start. Please let me know of any omissions and additions.
EcoIndiana
@ecoindiana.bsky.socialIndiana Native Plant Society
View ProfileIndiana Audubon
View ProfileIndiana Land Protection Alliance (ILPA)
View ProfileHoosier Environmental Council
View ProfileEarth Charter Indiana
View ProfileIndiana Forest Alliance
View ProfileSave the Dunes
View ProfileEcoIndiana
View ProfileFriends of Ritchey Woods
View Profilego.bsky.app/M6qcJbt
go.bsky.app/M6qcJbt