Hi,

A few of us who live in the city of Chicago are growing heirloom vegetables on our rooftops in cheap homemade earthboxes. In response to huge environmental problems, it's a small but rewarding way to push back. Also, we think they're a great way to build connections in a fragmented social/political landscape.

Here's the Flickr link, alongside the pics is a little how-to guide with plenty of relevant links.

http://www.flickr.com/photos/7458996@N06/sets/72157603652656573/