DeSmogBlog, a terrific "website dedicated to clearing the PR pollution that clouds climate change. We promote scientific facts about global warming, and aspire to debunk climate change deniers." is having a photo contest to "take the greenest photo ever. It can be literally a really green photo (but not of a green dress, that's cruel). Or it can be a metaphorically green photo, whether that's ecological or 'green with envy' or any other angle you can think of. In short, be creative!"
There are prizes too; a jury of eco-bloggers will choose the winner. Enter at Flickr: ::The Greenest Photo Ever Contest