The World around Us is Wonderful. Protect it

The World around Us is Wonderful. Protect it One of the most serious problems is air pollution. More and more factories cars and lorries add their bad breath to the air. Of course, cars are the world's biggest air polluters. There are a great number of cars in our cities and towns. In cold winter days their engines work day and night. They add their bad breath to the air. Another serious problem is water pollution. There are a lot of lakes and rivers around in our country.