Poster layout and Slogan

After much consideration, I've decided to use this type of layout for my poster.
Top: Main

Middle: Image / illustration

Bottom: Slogan / poster message



As for slogan, I chose:

"Stop deforestation, Stop global warming"

This slogan may not creative enough, but it suits both deforestation and global warming. We see this context as a whole, not just one part of it. We may stop or end global warming by eliminating its causes, in this case deforestation. Therefore, bigger impact can be achived.