Her friend Heather was there, too. Heather is an art teacher in Cupertino, California. She had her students do a collage illustrating environmental problems and solutions. A couple of her students had an anti-car or pro-bicycling theme in their problem/solution project. Posted here with Heather's permission.
"Cars Are Evil"
Here's the collage that Heather did, which also illustrates the bicycle as a solution.