The environment on earth is suffering from the growth of global population. The depletion of resources and biodiversity, the production of waste, and the destroying of natural habitat are serious problems that must be addressed in order to ensure that life on earth will be sustainable throughout the next century. Humans extract and build everyday, this effects our ecosystem and effects the pressure of the land. More population means more space to construct houses and availability of more consumer goods. It also requires more means of transport, more consumption of fossil fuels and more pollution of air, land and water. Thus growth of population leads to pollution of air, land and water. Different types of pollution are causing a number of problems in the physical environment that are further affecting the biological environment seriously.
I hope this helps in some way!