It is the only planet that supports life. (As far as we know)
earth
Earth is the most habitable planet in the solar system, which is why there is so much life on it. As far as we know, no other planet has life on it. Mars could possibly support human life, with supports to help them.
Earth is called a life sustaining planet because it has life on it, and is currently the only known planet that supports life.
Earth is only one planet on solar system which has sustainable atmosphere. In other words, Earth got all the factors that can support the life. Edit: Temperature is important too, and liquid water seems to be essential.
Earth is the only one we know about.
It is the only planet that supports life. (As far as we know)
At the moment, as far as we know, the only planet suitable to support a diversity of life is our Earth.
Earth supports life, because it has oxygen.
Earth
The planet that supports life, and has an ozone layer. Unless there's another world with life, instantly it's Earth.
We do not know of any other planet with a sustainable atmosphere that supports human life.
Earth
earth
Earth is the most habitable planet in the solar system, which is why there is so much life on it. As far as we know, no other planet has life on it. Mars could possibly support human life, with supports to help them.
Earth is called a life sustaining planet because it has life on it, and is currently the only known planet that supports life.
Earth is the most habitable planet in the solar system, which is why there is so much life on it. As far as we know, no other planet has life on it. Mars could possibly support human life, with supports to help them.