With the development of science and technology, people's lives have been greatly changed. There is no doubt that we benefit a lot from the scientific advancements in many different ways. For instance, the invention of computers dramatically increases work efficiency and helps complete many difficult tasks that were impossible in the past. Apart from this, new discoveries and technology in medicine improve people's health, which allows them to enjoy a longer life. The progress of science also enlarges human's ablilities to explore the world around them, from up into space to deep under the sea. Thanks to the development of science and technology, human society has enjoyed continuous prosperity and more convenience. However, just like a double-edged sword, science can cause problems too. It is known to all that the nuclear power, an environmentally friendly source of energy, can also be developed into a weapon of mass destruction. In addition, human cloning, which is expected to cure many serious diseases and save lives, may bring disasters of social morality. As a matter of fact, most of the improvements in science are made at the cost of our precious natural resources and have done great harm to the environment where we live in. Therefore, how to deal with the progress of science and technology properly is worth our careful consideration.
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