What I have learnt in English Unit 9

I have learnt that maybe next time, people may be living on Mars!! Won't that be interesting? Mars is smaller than Earth and also further away from the sun than Earth. People on Mars will have to recycle the air there with some special equipment and also keep the air from escaping. Scientists say that the people travelling to Mars will have to live in the spacecraft that brought them there. They will need a powerful rocket to push the spacecraft. They will have to grow their own food in greenhouses through moon dust. The people there will then build inflatable houses in underground cities. Actually, there are still alot of things about Mars but i can't be possibly saying everthing! So, bye bye...