Great progress in the three sciences – biology, chemistry and physics – has brought about many changes in man’s life and its environment; it has filled in the gaps between scattered countries into a global village through various telecommunications, the most recent one being the internet. But the negative aspects of the quick development of science must be taken into account. The first impact of science as a threat falls on man’s environment which doubtlessly has an effect on the people. Due to the increase in industrial activities, pollution occurs. The incessant release of more dust, smoke and other toxic substances makes breathing very difficult and if a person continues to live in such a polluted atmosphere, he or she will contract respiratory diseases or can even end up with lung cancer. Water pollution is also a threatening problem to mankind. Dyes and soap when discharged continuously in rivers, lakes or ponds cause the water to become undrinkable. In some regions, uneducated fishermen collect the infected fish on the banks of the river. The fish is cooked and eaten. As a result, the consumer gets contaminated. Similarly, the whole country’s people are put in danger. Another negative effect of science is the destruction of the protective ozone layer. Because of the highly toxic and harmful smoke released by the several chimneys of industries: Chemical ones mainly; and the CF Cs in the air, a hole near the North Pole can now be seen. Greenhouse effect is occurring. The ultra-violet rays of the sun reach us easily and this leads to skin problems due to sun radiation.
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