The Population,population in Pakistan.

The Population,population in Pakistan.
The total number of people living in an  area at particular time is called Population.For example in 1998, 130.5 million people were living in Pakistan.We call it the population of Pakistan in 1998.And today population of Pakistan is 0.20 billion, which is growing very fast day by day.Human population at global level  is fastly increasing in the modern period.It can be  easily judged from the fact that population on earth has doubled during the last forty one years.Population growth rate in under-developed countries is much higher than that of developed countries.For example,at present average annual population growth rate in Pakistan is 2.6 percent whereas it is 0.6 percent in USA and 0.2 percent in Britain and Japan.This growth rate (2.6%)is higher even than the SAARC countries.Resources in any ecosystem are limited.Thus,every ecosystem  has a capacity to support(provide requirements of housing,food and protection) a definite number of individuals.If  population exceeds the carrying  capacity of an ecosystem,the population has to face problems.In case of human populations we can say that faster growth in population of an area affects the economic progress of that area.Resources come under pressure and development stops.Rising population affect the environment in many ways.Consequently,a number of environment problems of physical,economic and social nature arise.Basic necessities of life such as clean air,water,housing and food are not properly fulfilled.Facilities of health and  education are not available for all.Inspite of all out efforts for development quality of life falls.Increase in population also produces social-cultural and moral problem.Crime,violence,uncertainly,hunger and sense of deprivation cast very negative effects of society.Some important environmental problems are poverty,poor quality of life,pollution degradation of land,destruction of forests,expansion of cities,migration.People come to live in an area for the sake of better job opportunities,more health and educational facilities and for social political reasons.This act is called migration.Migration from rural to urban areas leads to huge increase in city population.Consequently,many people are forced to live in slums.The quality of life of a nation is judged by certain indicators,which are education,health,nutrition,housing and other facilities such as clean water,electricity.Due to increased population and shortage of resources,number of illiterate children is increasing day by day.Forests are cleared to fulfill the needs of growing population.This action leads to unfavourable climate changes.Soil erosion occurs and fertile agricultural land is wasted.Modern industrialized era has seen explosive increase in world population.Population growth rate is specially very high in developing countries.Fast rate of population growth has led to many environmental problems of physical,economic and social nature.Quality of human life has been adversely affected.