I love the environment (you know this, right?) and I am a big fan of those WPA era posters.
Though I wouldn't necessarily like to live post-Great Depression, I would love the government to sponsor all my artist friends in making public service announcements.
I ran across the Green Patriot poster project today. It's all about combining environmental activism with great images. They've produced a book, you can find here.
I am drooling over it! Check out this one by artist Ryan Dumas (image source).
or this one by jaegerrae, (source)
Visit their site and submit your own design!