While this April 22 Earth Day was focused on the United States , an organization launched by Denis Hayes , who was the original national coordinator in 1970 , took it international in 1990 and organized events in 141 nations .
While the first Earth Day focused on the United States , an organization launched by Denis Hayes , who was the original national coordinator in 1970 , took it international in 1990 and organized events in 141 nations .