We will have developed traffic. People will work and study at home. The robots will be used everywhere. People who get serious disease can be treated now .With the development of the world economy people will live better and better . But environment problems become more serious . Some people think the earth is not suitable for people to live in .We should look for another planet to live in .1交通便利.2人们可以在家里工作和学习.3机器人将会广泛应用于各个领域.4很多目前无法治愈的疾病得到了解决.5随着世界经济的发展,人们的生活水平越来越好,但是环境问题日益严重,有的人认为地球将不适合人类居住 .人们得另外找一个适合人类居住的星球才行