7-10 предложений на английском языке на тему: "Pollution" (загрязнение) с переводом.

People have always polluted their surroundings. But until now pollution was not such a serious problem. In past most people lived in uncrowded rural areas and didn’t have pollution-causing machines. But with the development of crowded industrial cities the problem of pollution has become more important. Using automobiles and other machines made pollution steadily worse. Since the 1950’s people have become alarmed with the danger of environmental pollution.