Page 99 - SST Class 07

of technology such as factories, family, industries,
monuments, bridges, roads etc. Even today man is Just Think!
creating things from the natural environment with
the help of more advanced technology. How do human activities affect our environment?

Ecosystem
A unit consisting of plants, animals and
microorganisms (biotic factors) in an area
functioning together with the non-living (abiotic
factors) of the environment, forms an ecosystem .
A desert, a forest area, a grassland, a lake, an
ocean, even an aquarium are examples of
ecosystem. An ecosystem might be as small as a
pond or as large as a desert. The larger ecosystems
are also specific kinds of vegetation, such as the
tundra or the tropical rainforests. In each
ecosystem, the plants and animals adapt
themselves to their environment.

Man has controlled his environment in many
other ways as well. Like plants have been
cultivated in places which are far from their
natural habitat. Natural wealth has been converted
into resources, that have helped build the world
we live in today. Different environment have
different qualities and uses. Each needs to be
carefully managed and protected for future. The
need of the hour is to limit the use of resources
and protect the environment. This is possible by
controlling population growth, preventing
Ecosystem
pollution, planting trees, using alternative eco-
friendly fuels like CNG and prohibiting the use of Nature maintains a perfect balance between all
polythene. This will help to maintain the balance the components of the environment within each
of nature and preserve our environment for the ecosystem. If any one component of ecosystem is
future generations. disturbed, this balance can get easily disturbed.

v The surrounding in which an organism lives is its environment.
v The two parts of environment are natural environment and human environment.

v Natural environment includes air, water, land and food which are essential for living beings. It comprises
lithosphere, hydrosphere, atmosphere and biosphere.

v Man modified natural environment and created human environment.
v The human environment includes everything that has been made by humans, such as buildings, dams,
bridges etc.
v Resources should be used judiciously and all measures should be taken to protect the environment.

Environment
99