science priority

There is much debate over the issue that how many people will be improved if the results of science priorities are successful. Different people take different opinions over the question due to their distinct backgrounds. As far as I am concerned, every field of scientific research, include both of which will lead to direct and indirect interests , are essential to the world .
First of all, the final aim of any scientific research is set for improving living quality of humankind. There is no scientist do research without any reason. For example, thanks to the research of health, life expectancies in almost every country are up. Also, nowadays, people are not necessarily worried about they will be infected Black Fever, a terrible infectious disease which have killed almost half of Europe¡¯s population in Middle Age due to the improvement of medical science. And sc...