Because it is the best life supporting planet that we know of and it has oxygen, plants and food. It's atmosphere is also strong enough to hold the oxygen and other gases. It also has gravity so every thing doesn't just float away...
The planet Earth doesn't need life; and especially humans are a danger for the Earth.
Earth, is famous for being the only planet known by us humans that can support life.
It is important in case there is life beyond Earth.
The planet is worse off with humans.
Earth is the ONLY planet suitable for humans.
Humans are already on planet Earth... we don't need to 'travel' to Earth. Humans already fare quite well on planet earth.
Because earth is the only planet that has life on it if it weren't for earth there would be no such thing as humans and animals and plants and school and you.
Earth is currently the only planet where it is known that beings can exist. However in my opinion the universe is so unthinkably huge that there must be another planet where there are the right conditions for life.
not sure i think humans have legs know i have visted the humans planet 'earth' nice planet.
earth is the first planet humans have visited and the only one
It has dogs, fish, trees, people, and cars on it.
The third planet from the Sun is Earth. It is the only known planet to support life and is the largest of the four inner planets in our solar system. Earth has a diverse range of ecosystems and is home to millions of species, including humans.