The courage these two showed one time ripple affected for decades to come. At just the 10 year anniversary of this holiday, it had its principal event held in Washington to mark the 10 years of Earth conscious legislation. We saw the creation of the EPA this year along with environmental laws; like The Clean Water Act and Toxics Substance Control. Through the 1980s Earth Day became an international event, as well as international policy initiatives. The movement was booming so by 1990 they went back to the activist who started it all, to keep it booming. Dennis Hayes made a comeback in Earth Day 1990 to help with global mobilization. This globalization meant 200 million people in 141 countries, all celebrating Earth Day.