New York based artist,  Joshua Allen Harris harnesses subway exhaust to make his inflatable creatures come to life. Harris tapes his creations to sidewalk grates and vents and the air expelled by passing subway trains animates his animals.

In 2008, Harris, who is a fine arts student at the School of Visual Arts in New York, worked with  the Environmental Defense Fund to create a commercial that promotes the  use of public transportation to fight global warming. You can view the commercials at Fight Global Warming.com.