AADL has tried a few things in the eco area though I haven’t looked into it as much as I probably should. A few I know about are the tree removal at the new branch site and the change to reusable bags.
A couple things that came across the reader recently were Eco-Libris (via LibrarianInBlack) which aims to plant trees to offset book production:
An interesting idea and they are looking to partner with publishers, libraries, bookstores, etc. I’m not familiar with the facts behind book production so can’t speak about the logic of it but something to look at.
Another post was over at librarian.net about the lending of home energy meters at libraries. This appears to be a partnership with local organizations. There’s probably quite a few opportunities out there for partnering with organizations about lending kits, products or other items for community education.