Air pollution is a big problem for people and the environment. If you sit in a traffic jam in Cairo, your lungs will fill with the exhaust fumes from cars, buses and lorries. Air which is polluted by exhaust fumes can damage your health as well as the environment.
Scientists are working on the problem of exhaust pollution. Now, all cars burn petrol more efficiently than in the past. Scientists have also designed engines which use natural gas, and many buses in Cairo and other cities use these engines.
Engineers also designed electric cars that use batteries. The batteries in early electric cars could not store as much fuel as petrol vehicles. This meant that they could not travel as far or as fast as petrol cars. Now, however, engineers have designed cars which use both electricity and petrol. When the battery is empty, the petrol engine takes over, and when the car uses petrol, this recharges the battery. These cars can go farther using the same amount of petrol as ordinary cars.
Scientists have also discovered that cars can run on vegetable oil, which means that farmers will be able to “grow” fuel in their fields. And now engineers are working on a new type of car battery which makes energy out of hydrogen and oxygen. Experts believe that we may be able to buy cars using these batteries in the next ten years.
We know that at some time in the future, there will be no oil in the world, so we need to find a replacement for petrol as soon as possible.
Scientists are working on the problem of exhaust pollution. Now, all cars burn petrol more efficiently than in the past. Scientists have also designed engines which use natural gas, and many buses in Cairo and other cities use these engines.
Engineers also designed electric cars that use batteries. The batteries in early electric cars could not store as much fuel as petrol vehicles. This meant that they could not travel as far or as fast as petrol cars. Now, however, engineers have designed cars which use both electricity and petrol. When the battery is empty, the petrol engine takes over, and when the car uses petrol, this recharges the battery. These cars can go farther using the same amount of petrol as ordinary cars.
Scientists have also discovered that cars can run on vegetable oil, which means that farmers will be able to “grow” fuel in their fields. And now engineers are working on a new type of car battery which makes energy out of hydrogen and oxygen. Experts believe that we may be able to buy cars using these batteries in the next ten years.
We know that at some time in the future, there will be no oil in the world, so we need to find a replacement for petrol as soon as possible.
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