2. POLLUTION
Pollution is a process in which the environment
cause unwanted change that is not good for
environment that is called pollution.
In our case we will learn about two type of
pollution.
1.Air pollution
2.Water pollution
3. AIR POLLUTION
AIR
Air is a mixture of many gases that present
in atmosphere in fixed ratio.
Air pollution
when the ratio of air is disturbed for any
reason is called pollution of air.
4. PRESENCE OF AIR IN ATMOSPHERE
s.no. Name of air percentag
e
1. Nitrogen 78%
2. oxygen 21%
3. carbon dioxide &other gases 1%
5. SOURCE OF AIR POLLUTION
Industrial waste: Increasing of
population of world. So, demands of
things is also increasing. When demands
of things increase then factories are also
increasing. So, the formation of gases like
methane , carbon monoxide that is
dangurous for the environment.
6. BURNING OF FOSSIL FUELS
when burn the fossil fuel like petroleum
,coal
leads harmful gases like carbon monoxide,
carbon dioxide.
