*) Talk about ways to save energy:
As you know, our energy has limitation, so we must save energy because of the following ways. Firstly, we have to turn off the electric appliances when we do not use them. Secondly, by using bicycle or public transports instead of motorbikes or cars. Finally, we should not throw all used papers and bottles. I suggest collecting them to reuse and recycle. Therefore, if we follow the above ways, we will not only save money but also conserve the energy.
Talk about the main of transport in the future:
I believe that in 20 years the cars we drive will not be that different. I think most of the cars will move away from traditional fuel sources, but for the most part, will remain unchanged. I think the biggest problem we face isn't changing the vehicle itself, but the infrastructure that it depends on. I believe in the next century we will see a change in the road systems which will allow for greater density of vehicles, reducing the amount of space needed for roads and highways. Americans want a vehicle that can go anywhere, off road, on a race track, or down the freeway, and I believe in the future we will have multiple cars for different uses. One car for cruising around town, probably a fully electric vehicle, and another for commuting and urban driving. For those who still crave a little dirt under their tires, I think there will always be traditional Jeeps, trucks, etc. We will always have a large need for construction equipment, and I don't see those vehicles changing, other than by converting to cleaner fuels. I also believe that before 2050, self-driving cars will be coming on the market. If a 'track' system, or some system of guidance were implemented on major thoroughfares and in urban areas, a commuter could simply pull onto the freeway and switch to autopilot. This would allow cars to flow in a much more organized fashion, allowing higher speeds, safer roads, and fewer emissions caused by road congestion. The other thing I see increasing is the use of air travel. If aircraft could be made easy enough to fly by the average Joe, with a licensing system equivalent to the DMV, I believe more people would travel by air. Whatever happens, I believe or streets will be safer to drive on, and our cars will be more fun to ride in.