Page 164 - Health, Population and Environment Education 9

c. Earthquake
When there is collision between tectonic plates of the
earth, there is release of energy that creates shaking of
the land. It is called earthquake. Due to shaking of land,
the physical structures like roads, bridges, buildings,
industries, monuments, etc. are destroyed. There is
even occurrence of landslide, flood, avalanche, etc.
Destruction of buildings, industries and monuments
creates dust, thereby leading towards air pollution.
It kills animals and humans. Moreover, occurrence Fig: 6
of flood and landslide destroys land features, plants, Earthquake
animals, pollution of land and water, spreading of diseases etc.

d. Flood and landslide
Due to excessive
deforestation and heavy
rainfall, there is occurrence
of flood and landslide. Flood
erodes soil, cultivable land
and destroys plants, human
settlement areas. Flood
even sweeps aways human Fig: 7
beings as well as animals.
Landslide damages forest, Flood Landslide
land structure, human settlement, cultivable land, etc. Moreover, flood and landslide
also cause land and water pollution.

e. Depletion of ozone layer
There is a layer of ozone gas covering the atmosphere
which shields the earth from entrance of harmful ultra
violet (UV) radiation in the earth. Due to unmanaged
industrialization, there is discharge of excessive
amount of smoke containing greenhouse gases like
CO , CO, CH , NO, NO , CFCs in the atmosphere. The
2
4
2
accumulation of large amount of greenhouse gases
depletes the ozone layer. Depletion of ozone layer
causes entrance of harmful UV radiation in the earth. Fig: 8
As a result, there is serious impact on plants, animals Ozone layer depletion
and entire environment. UV rays cause cancer, skin problems and respiratory problems
in animals including human beings. Similarly, there is increase of water pollution, land
pollution, acid rainfall, desertification, etc.

164 GREEN Environment Population and Health Education Book-9