Every thing in this world will have both the negative and positive shades. In the same way science may be boon or bane to the present world.
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They say science is bane or boon which means that science is good or bad. everything has good at the same time bad. science has well developed our lifestyle-this is a good one. but the same time science is also creating unwanted things like bombs-this is a bad everything is equally good and equally bad.