Men are an important part of the
bio-tic component of the environment and simultaneously they are an important
factor of the environment. Thus, men play important roles in the natural
environmental system in different capacities such as biological, social, economic, and technological. All the natural
functions of human beings such as birth, growth, health, and deaths are
affected and determined by natural environment in the same manner as the cases
of other organisms. However, men being most developed and advanced animal both
physically and mentally and technologically, is capable of making substantial
changes in natural environment so as to make it suitable for his own living.