Creative public service ads

This is an interactive environmental ads, the picture which placed on the footpath, is a shrivelledtree. On the two side of this picture, is placed green paint, while people walking cross the picture, the green paint will paint on the picture. The tree will getting greener and alive again. In the way of educate people that we can make our environment green through our foot, in other words, the more we walk (instead of driving) the more we protect the environment.