People use oil as an important energy source. Many machines need oil like cars, airplanes and ships. But because the population is increasing, we use more oil than before, and it is becoming scarce. In the future, we may have no oil to use. What will the people do? And what will the world be like?
The prices of the oil may be higher, and countries will arguing because of the lack of energy. However, humans are smart and they know arguing and complaining won’t make the situation better. So they may try to find new energy, which is clean and can be recycled. For example, water, wind and solar power can be used. They are all clean and can be recycled. But the only problem is they are not stable. Some countries are dry, and sometimes there is no wind. We can’t use solar power at night. Therefore, maybe we can use some plants to make energy. We have known that corn can used as energy. We can also use bio-mas, perhaps people will find more in the future.
Some people even have a crazy idea that maybe “we” can make energy, too. When we are sitting on a chair, under the table have a bicycle. Under the house there is a machine. When we are bicycling, the machine can use our movement to make energy. Isn’t that fun?
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