Science and technology have been bringing human beings tremendous Thanks to science and technology， we now live comfortably and conveniently in houses furnished with air conditioners， refrigerators， washing machines and televisions Thanks to science and technology， we can eat fresh vegetables att the year Thanks to science and technology， we can travel tong distances in the fraction of a second on planes， trains and Thanks to science and technology， we wear clothes with synthetic materials which can not easily be worn However， science and technology have atso brought us a tot of First， because of the many breakthroughs in the field of medicine， people are now living much longer than they used As a result， the population of the world is increasing， causing tots of Second， because of the development of industry， tots of the wastes from factories pour into the air and rivers， causing pollution of att Third， some terrorists are using science and technology against They use biological， chemical and unclear weapons to threaten world So it's urgent that we find ways to solve these But we should not stop the development of science and technology because of these disasters they bring， just as we should not give up eating for fear of In addition， we should make some rules to regulate our As long as we use science and technology in a proper way， they may bring us even more
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