A.Because both have a limited supply of air, water, and other resources.B.Because the Earth moves around the sun as fast as a spaceship.C.Because we can travel to outer space.D.Because the Earth never stops moving.
A.Because both have a limited supply of air, water, and other resources.
B.Because the Earth moves around the sun as fast as a spaceship.
C.Because we can travel to outer space.
D.Because the Earth never stops moving.