Earth Day 4/22/22 2022 marks 52 years since the first Earth Day. Read up on these Earth Day facts, like who’s credited with starting it and how many countries observe it. Then, take this Earth Day quiz to test how well you know our planet. https://www.rd.com/article/earth-day-quiz/ 1. 10 percent of the U.S. population celebrated the first Earth Day 2. The first Earth Day spurred immediate action: The impact of that first Earth Day was immediate and profound; by December of 1970, President Richard Nixon had established the Environmental Protection Agency and the Clean Air Act was devised and passed that year 3. Each year’s Earth Day celebration has a theme: In 2016, the theme of Earth Day was “Trees for the Earth” with the goal of planting 7.8 million trees in time for Earth Day’s 50th anniversary in 2020.