With the evolution of civilization over the past several thousand years, man has made tremendous progress in all aspects of human society. While enjoying all the convenience and happiness brought about by this progress, we cannot deny that it has also caused severe problems. Scientific advance is always praised and extolled by many as the most essential cause of social development.

However, we shall not forget that one the other hand, major scientific inventions and technical advancement sometimes also form big threats to human society. The two World Wars happened during the past century witnessed the blood shedding battles that cost millions of lives. Weapons made with modern technology have brought about such large causalities and devastations that could never been done by people in the previous time. Environmental problems have attracted more and more attention of the people around the world. With the development of modern industry and farming, global environment has kept deteriorating. Scientific researches indicate that the green house effect has contributed to the warming of the earth.

ADVERTISEMENTS: