On the first Earth Day in 1970, I was 10 years old. Someone from our neighborhood in upstate New York had dropped off a flyer. It suggested we gather to clean up the street that connected our neighborhood to the busy main road. That street was littered with trash, dead leaves, and the remnants of late night teenage partying. I don't know who sent that flyer around, but I'm still grateful to them, because it was one of the best days of my childhood.