With the vast studies of the scientists, they found out that the planet Mars has a similarity of the planet earth. In fact, the new studies found out that the vast region of Mars contained rivers and lakes when the planet was young. The studies also shown that the water subsisted for quite some time which mostly in standing pools, in which beneficial to the formation of basic organic matter.
Since the scientists have no more evidence yet that the planet Mars can be a good habitat of the humanity, still they are looking for great evidences if the planet can really be a good place to live normally just like to the planet earth. If possible this would happen, and then the planet earth will never have a problem of over population. And perhaps have a better place from the other planet.