More than 8 billion people inhabit our planet, and each year Earth Day reminds them of the need to take care of their home. The springtime holiday, which takes place today—April 22—dates back to 1970, ...

On Earth Day 1971, a bunch of eighth-grade pals and I snubbed the bus and rode our bikes to school on some pretty busy streets in Santa Clara, Calif. The word “green” was not part of our vocabulary ...