Pictured above is an artist's conception of what the Bus Roots project will look like upon completion. The team behind this venture hopes to plant gardens on the roofs of buses in New York City:

A public transit bus has a surface of 340 ft2. The MTA fleet has around 4,500 buses.

If we grew a garden on the roof of every one of the 4,500 buses in the MTA bus fleet, we would have 35 acres of new rolling green space in the city.

Link via The Presurfer | Flickr Photostream | Photo: Shane Rankinsoon Photography