According to Karl Popper, one of the strongest motives for scientific discovery is the search for truth. The growth of Science leads to a growth in knowledge.
Lead was originally used to reduce the noise of machines. However, it was later found to have detrimental effects to human health.
CFC was invented as refrigerant but it causes the depletion of ozone layer and thus global warming.
It is the responsibility of government agencies to ensure the appropriate uses of scientific inventions. The Food and Drug Administration regulates and supervises food safety and pharmaceutical usage.
The profit-driven commercial firms, such as that of cosmetics, may disregard potential hazard of certain chemicals.
Scientists may foresee the potential dangers of nuclear fission but if they are deterred by such concerns, nuclear technology would not have been developed as an alternative source of renewable energy.
Genetic engineering evokes ethical concerns which is seen to be morally wrong by many religious conservatives.
When Albert Einstein realised the abuse of his mass-energy equivalence equation to make nuclear bomb, he devoted his later life to campaign against such misuse.