The frequency of development and safety

Today we are entering to a super technological era.So we need new technologies for development in our carrier,life,more ever for build nation.So the development is neccesery ,we going forward for  achieving our goles,on the journey produce some harms.That is we can explain very easily by the help of Newtons law of motion (every action create equal & opposite reaction),we do any thing that give some final product,that the product may be good or bad.For example,if we produce fire with wood it give heat,smoke,light.the main purpose of fire is heat,the others are some side product ,it harm to nature.so we do any work ,minimise the side effect by adequate safety masseurs.we return back to our subject,in the ancient period the the technology is very simple so the risk for harm is simple .in the modern periods the technology innovations Create complicated safety problems,so the risk of harm is moderate .but in the supper technological period machinery's are very complicated &safe.so there is Chance for harm is very law but if any thing happening with that technology ,the severity & frequency of accident is very high .so safety professionals must alert about that hazards.