Cartoon Art Museum - Pogo creator Walt Kelly marked the first #EarthDay in 1970 with the creation of this iconic poster. | Facebook
When is Earth Day? | wcnc.com
Why the First Earth Day (April 22, 1970) Still Matters
Earth Day 1970: Photo Gallery
April 22, 1970: Tell Your Mother You Love Her | WIRED
The first-ever Earth Day and its evolution into a global event | CBC
This Day in History: The first Earth Day held in 1970
20+ Memorable Earth Day Posters from 1970-2009 | Red, Green, and Blue
Earth Day | Brewster, Don | Leydenfrost, Robert | V&A Explore The Collections
The History of Earth Day - Earth Day
These Pictures Show Just How Big The First Earth Day Really Was 50 Years Ago
Who Is Earth Day For? – The Novum
The First Earth Day: A Brief History
This Day in History: The first Earth Day held in 1970
Almanac: The first Earth Day - CBS News
Earth Day – Earth Archives
Celebrating the 40th Anniversary of Earth Day | Earth day posters, Earth week, Earth day
earth day poster, first day, Mother Earth, nature, trees, with a plant collection design on a soft earth background 23103213 Vector Art at Vecteezy
Old Gold: Remembering Iowa's First Earth Day, 50 Years Later | University of Iowa Center for Advancement
Green Earth Day Event Poster - Venngage
Earth Day Slideshow - PowerPoint Lesson for Kindergarten and First Grade - My Happy Place Teaching
The First Earth Day Poster Unearthed At NYPL - Gothamist
440+ First Earth Day Stock Illustrations, Royalty-Free Vector Graphics & Clip Art - iStock | Earth day 1970
New film 'Earth Days' takes a sometimes devastating look at the history of environmental activism | Grist
Poster from the first Earth Day - NYPL Digital Collections
Earth Day: A Story Of Us | National Air and Space Museum
