1, 1940 , 2 , 1950 , 3 , 1960 , 4 , 1970 , 5
The celebration of the first “ Earth Day” Could be placed in the timeline represented by what number?
A)2
B)3
C)4
D)5
The celebration of the first “ Earth Day” Could be placed in the timeline represented by what number?
A)2
B)3
C)4
D)5