For Earth Day on April 22, interesting facts including who invented it, why it's on that date, and how it turned into a ...

It's been more than 50 years since the first Earth Day in the United States. On April 22, 1970, people gathered at events across the country to raise awareness about the environmental issues impacting ...

WASHINGTON — As communities across the DMV commemorate Earth Day, it’s worth remembering how this annual celebration began and why it remains so vital today. Earth Day was first observed on April 22, ...

Add Yahoo as a preferred source to see more of our stories on Google. From April 22, 1970, CBS News covers the first ever Earth Day with reports from across the United States. Note: This CBS News ...