Content abstract:Population growth is a global problem ,the problem being that human being
exists.What effect ,human being will population growth bring about being how to answer after all
to our living environment?How heavy burden ,living environment to us does the population increase
bring about what to have accepted threat for our earth?Human being is consistent mainly on this
problem.Key words:Population growth ,air ,water ,land ,food ,human being resume:The
environment contaminating has very big damage to human body health.Or pollution passes air in a
short time ,diversified medium such as water ,food chain intrudes into the human body,several
kinds pollution intrude into combinedly in large amount.