Environmental pollution is one of the serious problems faced by the people in the country, especially in urban areas, which not only experiences a rapid growth of population due to high fertility, low mortality and increasing rural-urban migration, but also industrialization which is accompanied by growing number of vehicles. In India, the rapid increase of human numbers combines with desperate poverty to deplete and pollute local resource bases on which the livelihood of present and future generations depends. Though the relationship is complex, population size and growth tend to expand and accelerate these human impacts on the environment.  

According to the World Development Indicators report in 1997, 1.5 billion people live exposed to dangerous levels of air pollution, 1 billion live without clean water and 2 billion live without sanitation. The increase of population has been tending towards alarming situation. The world\'s population was estimated to be 6.14 billion in mid 2001 and projected 7.82 billion and 9.04 billion in the year 2025 and 2050 respectively. Contribution of India alone to this population was estimated to be 1033 millions in mid 2001 which has been projected 1363 millions and 1628 millions in 2025 and 2050 respectively. (2001 World Population Data Sheet). According to the provisional results of the Census of India 2001, the population of India on 1st March 2001 is 1027 millions. If the world population continues to multiply, the impact on environment could be devastating.  

Population impacts on the environment primarily through the use of natural resources and production of wastes and is associated with environmental stresses like biodiversity, air and water pollution and increased pressure on arable land. India is the world\'s sixth largest and second fastest growing producer of greenhouse gases. Delhi, Mumbai and Chennai are three of the world\'s ten most populated cities. Two-thirds of city dwellers lack sewerage, one-third lack potable water. India grows equivalent of another New York City every year in its urban population. By the year 2000, more than 350 million Indians will live in cities. In 15 years, more than half of Indians will be urban dwellers; 1/3 will be slum dwellers and squatters (downloaded from http://  www.usaid. gov/in/ programareas/ environm.htm). India is one of the most degraded environment countries in the world and it is paying heavy health and economic price for it. According to a World Bank sponsored study, estimated environmental damage in the year 1992 amounted to about US $ 10 billion or Rs. 34,000 crores, which is 4.5 % of GDP. Urban air pollution costs India US $ 1.3 billion a year. Water degradation leads to health costs amounting to US $ 5.7 million every year,   4 nearly 60 percent of the total environmental cost. Soil erosion affects 83 to 163 million hectares of land every year. Beside, land degradation leads to productivity loss equal to US $ 2.4 billion or 4 to 6.3 percent of the agricultural productivity every year (UNDP 1998). 

The lack of services such as water supply, sanitation, drainage of storm water, treatment and disposal of waste water, management of solid and hazardous wastes, supply of safe food, water and housing are all unable to keep pace with urban growth. All these in turn lead to an increase in the pollution levels. Also the unplanned location of industries in urban and sub-urban areas followed by traffic congestion, poor housing, poor drainage and garbage accumulation causes serious pollution problems. However, all these factors together not only lead to deteriorating environmental conditions but also have adverse effects on the health of people. The peoples in environment polluted areas are infected by pollution related diseases. Due to air pollution the incidence of respiratory diseases lead to increase and water pollution triggers the number of patients suffering from acute water borne diseases. Hence it have been the main areas of concern for demographers, ecologists, planners and policy makers over the recent past. The present paper is an attempt to examine population growth, increasing urbanization and its influence on the environment and health of the people. 

Demographic characteristics of the population of India India is the second most populous country in the world after China. India supports 16.87 percent of the world\'s population on its meager 2.4 percent world surface area of 135.79 million square kms. The selected demographic characteristics of the population of India are presented in Table 1. At the time of independence country\'s population was 342 million. The country’s population size had grown from 361 million in 1951 to around 846 million in 1991 and 1027 million in 2001. The population of India almost trippled during the period of 1951-2001. The phenomenal increase in the population during the last fifty years has led to rapid industrialization and high rate of urbanization which have created tremendous pressure on natural resources like land, air and water. The urban population has increased three and half times, from 62.4 million in 1951 to 217.6 million in 1991 and it again increased to 288 million in 2001. The percentage of urban population increased from 17.28 percent in 1951 to 23.33 percent in 1981, 25.71 percent in 1991 and which further increased to 28 percent in 2001. The decadal growth rates of the population are irregular, as it increased from 13.31 percent in 1951 to 24.8 percent in 1971 and afterwards it marginally declined to 24.7 percent in 1981, 23.9 percent in 1991 and 21.34 percent in 2001. The urban growth lead to an increase in the pollution levels and exposes population to serious environmental health hazards. Environmental pollution in urban areas is associated with excessive morbidity and mortality. Overcrowding and inadequate housing contribute to pollution related diseases such as respiratory diseases, acute water borne diseases, tuberculosis, meningitis and various other diseases. Lack of opportunities for gainful employment in villages and the ecological stresses is leading to an everincreasing movement of poor families to towns. Mega cities are emerging and urban slums are expanding. There has been three and half times increase in urban population over 1951-1991. During the past two decades of 1971-91, India\'s urban population has doubled from 109 million to 218 million and is estimated to reach 300 million by 2000 AD. Such rapid and unplanned expansion of cities has resulted in degradation of urban environment. It has widened the gap between demand and supply of infrastructure services such as energy, housing, transport, communication, education, water supply and sewerage and recreational activities, thus depleted the precious scarce environmental resource base of the cities. The result is the growing trend in air and water quality, generation of wastes, and the proliferation of slums and undesirable land use changes, all of which contribute to urban poverty.