Someone said,'Science is a kind of technology that helps improving our lives,'However,someone with pessimistic mind will also like to express,'Science just ruin our lives and environment.' To me, I think science is a double-edged sword.
Firstly science helps us to get to know the mystery of our lives. After that we can study and find out how to cure those dieases that may or may not be contagious. Without science, we are just like primitives. Therefore science improves our lives undoubtedly.
Nevertheless if we just abuse the products of science and technology, science can ruin our lives.Dynamite and biological weapons are really good examples. They reward us with danger if we just use them unwisely.
Therefore I think science is a sword of two sides.
I hope i can help you.
参考资料:me