Air pollution is defined as the contamination of air by foreign substances that can interfere with human health and welfare when present in sufficient concentrations. It can cause issues like acid rain, ozone depletion, and smog. Water pollution occurs when pollutants are discharged into bodies of water without treatment, degrading the environment and ecosystems. Soil pollution involves toxic chemicals in soil at levels that pose risks to health and the environment. Noise pollution refers to sounds caused by humans that threaten human or animal health, mainly from vehicles, aircraft, machinery, and other equipment. Thermal pollution changes water temperature which can kill aquatic life adapted to specific ranges. Light pollution artificially alters night environments and can compromise health, disrupt ecosystems, and impact aest

1. The condition in which
air is contaminated by
foreign substances, or the
substances themselves.
Air pollution consists of
gaseous, liquid, or solid
substances that, when
present in sufficient
concentration, for a
sufficient time, and under
certain conditions, tend
to interfere with human
comfort, health or
welfare, and cause
environmental damage.
Air pollution causes acid
rain, ozone depletion,
photochemical smog, and
other such phenomena.
AIR POLLUTION

2. Water pollution is the
contamination of water
bodies (e.g. lakes, rivers,
oceans, aquifers and
groundwater). This form of
environmental degradation
occurs when pollutants are
directly or indirectly
discharged into water bodies
without adequate treatment
to remove harmful
compounds.
Water pollution affects the
entire biosphere of plants and
organisms living in these
water bodies, as well as
organisms and plants that
might be exposed to the
water. In almost all cases the
effect is damaging not only to
individual species and
populations, but also to the
natural biological
communities.
WATERPOLLUTION

3. Soil pollution is
defined as the
presence of toxic
chemicals (pollutants
or contaminants) in
soil, in high enough
concentrations to pose
a risk to human health
and/or the ecosystem.
In the case of
contaminants which
occur naturally in soil,
even when their levels
are not high enough to
pose a risk, soil
pollution is still said to
occur if the levels of
the contaminants in
soil exceed the levels
that should
naturally be p resent.
SOIL POLLUTION

4. Noise pollution refers to
sounds in the environment
that are caused by humans and
that threaten the health or
welfare of human or animal
inhabitants. A Young Boy
Covers His Ears to Block out
the Noise from a Large Jet
The most common source of
noise pollution by far, the one
that affects the most people
on the planet, is motor
vehicles. Aircraft and industrial
machinery are also major
sources. Additional noise
pollution is contributed by
office machines, sirens, power
tools, and other equipment.
Noise pollution is not easy to
measure, because the very
definition of noise depends on
the context of the sound and
the subjective effect it has on
the people hearing it. One
person's idea of exultant,
joyful music might be another
person's pure torment.
NOISEPOLLUTION

5. Thermal pollution is the degradation of
water quality by any process that
changes ambient water temperature. A
common cause of thermal pollution is
the use of water as a coolant by power
plants and industrial manufacturers.
When water used as a coolant is
returned to the natural environment at a
higher temperature, the sudden change
in temperature decreases oxygen supply
and affects ecosystem composition. Fish
and other organisms adapted to
particular temperature range can be
killed by an abrupt change in water
temperature (either a rapid increase or
decrease) known as "thermal shock."
THERMAL
POLUTION

6. Light pollution, also known
as photopollution, is the
presence of anthropogenic
light in the night
environment. It is
exacerbated by excessive,
misdirected or obtrusive
uses of light, but even
carefully used light
fundamentally alters
natural conditions. As a
major side-effect of
urbanization, it is blamed
for compromising health,
disrupting ecosystems and
spoiling aesthetic
environments.
LIGHT POLLUTION

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