The danger of biotechnology 
Is biotechnology (biological technology or life technology) a really safe and useful technology for human society as is commonly stated? To be sure, some people assert such a thing. Biotechnology, however, has a negative side (danger or invalidity) of causing damage to human health or disrupting ecosystem in a bad case because it is a technology with the purpose of forcibly creating materials or living matters preferable for humans by manipulating the fundamental material of life.         
Why is the usefulness of biotechnology emphasized too much and why is its negative aspect ignored? Before thinking over these questions, we need to contemplate its negative aspect, particularly its danger. The true nature of its danger consists in that biotechnology tries to handle things beyond human control.