215,628 people
200 people
32people participated i
550 athletes participated in the first commonwealth games
67 countries first participated in the International Geophysical Year in 1957-1958.
The first Earth Day celebration in Indiana on April 22, 1970, saw participation from approximately 20,000 people. This event was part of a larger nationwide movement to raise awareness about environmental issues and promote conservation. Earth Day has since grown into a global event, with millions participating each year.
According to the Wikipedia article on Earth Day (related link below) approximately 20,000,000 Americans participated in the first Earth Day.
about 201026541651 people
Enough
8 teams participated in th opening world cup 1975
1600
13
52