"Global environmental changes are occurring in ways fundamentally different than
at any other time in our history. Experts say that virtually all of the earth s
ecosystems have been significantly transformed through human actions, and that
60 percent of them have already been degraded. Population growth, movement,
density and resource consumption are considered to be the main driver and
multiplier of many environmental problems not only in India but all over the
world. The industrial systems have encouraged the centralization of populations
in urban areas, leading to the growth of mega cities and relative neglect of
rural habitats. These cities have, in turn, emerged as the main