Have you ever thought of what the world will be like in the future?

First, transportation will be very easy and comfortable. There will be no roads for cars or buses on land, and there will be no cars or buses that use fuel. Electricity will be used everywhere. In fact, we all use a kind of flying car to go from one place to another. It is faster than a plane. But much smaller. It is only for one or two people.

Second, we will have many kinds of robots to do most of the work we do now. There are robots to work in factories; there are robots to cook food for us; there are robots to carry heavy things for us, and so on. All we need to do is to tell them what we want to do.

Third, the air and water will be much cleaner. They will be as clean as they were hundreds of years ago. Because there will be far fewer people, and electricity rather than fuels will be used. Everyone will live a happy and healthy life.