The 2015 Green Earth Book Award shortlist was announced last month by the Nature Generation. Winners will be announced on Earth Day, April 22.
And in other environmental booky news, I stumbled upon a review of a book called Violet Mackerel's Natural Habitat by Elanna Allen at Chapter Book Chat. I'll look for it.
By the way, I found that Chapter Book Chat post at the March Carnival of Children's Literature.