Population growth is the change in a population over time, and can be quantified as the change in the number of individuals of any species in a population using "per unit time" for measurement. In biology, the term population growth is likely to refer to any known organism, but this article deals mostly with the application of the term to human populations in demography. In demography, population growth is used informally for the more specific term population growth rate (see below), and is often used to refer specifically to the growth of the human population of the world.

1. POPULATION GROWTH

2. POPULATION GROWTH ???

3. IMPACTS OF POPULATION GROWTH
 Impacts of population
growth on physical
environment.
 Physical environment
means – non living
environment or the
land, air, water, soil and
minerals .
 Impacts of population
growth on biological
environment.
 Biological environment
comprises of human,
biological systems,
flora and fauna, living
creatures from moth to
midgets.

4. IMPACTS ON PHYSICAL ENVIRONMENT
 Most critical resources for human life.
Population Growth
Utilization + Overuse + Misuse of
physical resources
 Includes impacts on fresh water, owen valleys, waste
management, allocation of resources, changing of
consumption pattern, rising demand for energy etc

5. IMPACTS ON BIOLOGICAL ENVIRONMENT
 The biological components are bound to suf fer the
consequences.
 Natural processes have been altered seriously that have
caused serious imbalances in ecosystems .
 Includes impacts on destruction of habitats, water crisis,
Generalization of waste, endangerment to species, health
condition etc

6. POPULATION AND SUSTAINABLE
DEVELOPMENT
 5 to 7 million hectares of agricultural lands are lost to
accelerating land degradation and rapid urbanization.
 2 billion hectares is degraded as a result of overgrazing and
poor farming practices.
 Another 16 to 20 million hectares of tropical forests and
woodlands are lost each year.
 Water scarcity defined as less than 1 ,000 cubic metres per
person per year.
 climate experts worry that continued increases in atmospheric
concentrations of CO2 – already 28 per cent higher than pre industrial levels .

7. POLLUTION
Pollution is the
introduction by
man into the
environm ent of
contaminants
that contains
harmful
substances