Undeniably, with the development of science and technology, our planet is being polluted by the green house gas or chemicals released by human beings, and such a fact leads impressionable people to generate the opinion that the vitalest target of science should not be to improve people's lives. However, such a statement suffers from both logical and factual fallacies, and it should be examined particularly. As far as efficiency, equality and environment are concerned, I strongly hold that the most important aim of science should be to improve people's lives.