Practicing the Future Perfect

What will the world be like in 100 years? What will have happened by then?

Write about the changes you think will have happened in 100 years.

The world will have lacked of water and other natural resources. By this reason, the water will have costed expensive. Also the  people will not have seen the sun because the air will have contaminated, the people will have used a respirator. I think the tecnology will have more advanced than our days. It´s possible the transportation will have moved by air and the people don´t need to cook food because the food was have been plastic or little food tablets with all nutrients.