Graham Rihn, founder of RoadRunner Recycling, reads a book about Earth Day to students at North Pittsburgh Children's House. (Photo by Lucas Zheng/PublicSource) When reading an Earth Day children’s book to a group of about 20 attentive and quiet students at North Pittsburgh Children’s House, Graham Rihn, founder of RoadRunner Recycling, got to a section with tips for protecting the Earth. The first item on the list, recycling, excited one student enough to break the silence.