Analyze the following statements about the article and mark T, if true, or F, if false.

( ) The first Earth Day event gathered 20 million people in the United States.
( ) Earth Days usually happens on the Spring equinox, which is on April 22.
( ) The Clean Air Act and the Endangered Species Act were proposed by Sen. Gaylord Nelson after the first Earth Day, in 1970.

The correct order of filling the parentheses, from top to bottom, is: