Sagot :
Answer:
Mars is only about one-half the diameter of Earth, but both planets have roughly the same amount of dry land surface area. This is because over two-thirds of the Earth's surface is covered by oceans, whereas the present surface of Mars has no liquid water.
Answer:
In planet Mars, there's only small amount of oxygen that human needed. While here in Earth, there's a tree that can give us oxygen to live us daily.