2. Davis/Earth Day 2. Davis/Earth Day Audio will be available later today. Facebook Twitter Google+ Email April 22, 199512:00 AM ET EARTH DAY BEGAN ON COLLEGE CAMPUSES 25 YEARS AGO, AND PHILIP DAVIS TAKES A LOOK AT THE STATE OF CURRENT STUDENT ENVIRONMENTALISM. Facebook Twitter Google+ Email We no longer support commenting on NPR.org stories, but you can find us every day on Facebook, Twitter, email, and many other platforms. Learn more or contact us.