The problem starts here. Cars burn gas, factories and power plants burn coal and emit toxic fumes. Thus, the air we breathe becomes polluted.
Also, the air is polluted by acid rain. When it rains, this pollution hits trees, houses, buildings, cars, clothes, everywhere!
Pollution of water and soil. When acid rain falls into lakes, streams, rivers and seas, they become toxic. Acid rain poisons trees and plants, causing damage to buildings and objects.
The good news is that governments are trying to reduce air pollution that causes acid rain. Some industries have long used new technologies to make factory smoke less harmful to the environment. But we need to do more!
There are different methods of travelling. You can travel by plane, by ship, by train or by car. Some people travel on foot. You can go along little lanes where the fast car can not go. You can wander through meadows, pass quite lakes and wonderful woods. Also you can see wild animals and flowers in the forest. You can feel the beauty of nature. But I think, it's not a very comfortable way of traveling, because you can get tired very quickly.
I'm very fond of travelling and I prefer to travel by train. I think it's very pleasant. Especially if you have a comfortable seat in a railway carriage you can have a splendid view of the countryside. If the journey is long, you can sleep and have a good rest. Moreover, I consider, big railway stations are quite excited places. There are crowds of people, the porters pull the luggage along the platforms, and hungry passengers hurry to the refreshment rooms.
Some people prefer to travel by plane. I can say it is, of course, comfortable and convenient method of travelling. And it is much quicker than any other method, but, I think, it's more dangerous. Moreover nowadays there are a lot of accidents and plane wrecks.