1.the weather will be good,because people will protect the enviorment.
2.there will be fewer cities,because everyone will get together.
3.there will be more buildings,because there will be more people.
4.there will be more people,because there are so many people in the world.
5.there will be more space stations,because technico is improving very fast.
6.there will be more subways,because we need more transportations.
7.there will be less free time,because people are very busy.