According to the Wikipedia article on Earth Day (related link below) approximately 20,000,000 Americans participated in the first Earth Day.
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It is 80 km wide and 500 km long.
No. It was not number one.
apple iphone
6.8 Billion people world wide.
The iPhone 4S.
2 people
Which university?
55,000
1.2milloin people are thought to be starving world wide.
Much less people than needed.
around 12 million people have it world wide
over 8 million people world wide
About 130 million.
only 1