science and destruction

Science can be used or misused. As we are inching towards modern era the destructive purpose is getting momentum.science can be a blessing as well as curse.
Take the case of fission and fusion.We can use this for
generation of power.But now it has got the most destructive side,Nuclear weapons,which can cause an end to earth population within no time.Again the use of halogen chemicals
made our environmental inbalance.Nobody else in the world can bring the ozone layer into the former condition and we are exposed to ultra violet rays .Again in the case of medical sc...