Living 20 million By Indy Staff Thu Apr 17, 2008 | 6:00am Share this: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Add independent.com on Google Add the SB Independent as your preferred source to see more of our stories on Google. 20 million The estimated number of people who celebrated the first Earth Day in 1970. source: epa.gov/earthday/history.htm.
