Earth Day is Sunday. The idea originated with a grown-up, but as Portland author Phil Hoose tells us, it wasn't long before children became an important part of Earth Day and the environmental movement.

Portland author Phil Hoose wrote We Were There Too: Young People in U.S. History. His look at the role children have played in Earth Day and the environmental movement is part of a series of interviews with Hoose about the role kids have played in holidays and other special dates.