Nowadays, life is much easier than it was hundreds of years ago. The world is becoming smaller and smaller because of modern traffic and communication(沟通) technologies. However, pollution is another new problem. Pollution comes in many ways. We see it, smell it, drink it and even hear it.
Air pollution is the most serious kind of pollution. It’s bad for all living things(生物) in the world, but it is not the only one kind of pollution. Water pollution kills fish and pollutes our drinking water. Noise pollution makes us angry more easily.
The earth is our home. We must take care of it. That means keeping the land, water and air clean, so many countries are making rules to fight against pollution.
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