Kamis, 19 Mei 2011

Silvina Nugrahwati _ Summary No.4

4. Throughout history man has changed his physical environment in order to improve his way of life. With the tools of technology he has altered many physical feature of the earth. He has transformed woodlands and prairies into farmlands and made lakes and reservoirs out of rivers for irrigation purposes or hydroelectric power. Man has also modified the face of the earth by draining marshes and cutting mountains to build roads and railways.

However, man’s changes to the physical environment have not always had beneficial results. Today, pollution of the air and water is and increasing danger to the health of the planet. Each day thousands of tons of gases come out of the exhausts of motor vehicles; smoke from factories pollutes the air of industrialized areas and the surrounding areas of the countryside. The air in cities is becoming increasingly unhealthy.

The pollution of water is equally harmful. In the sea, pollution from oil is increasing and is killing enormous numbers of algae, fish, and birds. The whole ecological balance of the sea is being changed. The same problem exists in rivers. Industrial wastes have already made many rivers lifeless.

Conservationists believe that it is now necessary for man to limit the growth of technology in order to survive on earth.

Summary:
Based on history, man change the environment to become more useful for life with technology, like making farmland, made lakes, reservoirs out of rivers, building roads and railways. Nevertheless, it also raised disadvantages, such as air pollution from vehicles, smoke from factories; and water pollution from oil industrial wastes in the sea and also in the river that danger the mortal and the earth. So, in other to survive on earth, it is important for us to limit the growth of technology.

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