1. WATER POLLUTION

2. What is water
pollution?
Well Pollution is the
contamination of the
natural environment
with harmful
substances often as
a consequence of
human activities.

3. There are many
differents types of
pollution as:
• Water pollution
• Air pollution
• Land contamination

4. How does water
pollution occur?
Water pollution occurs when a lot of
chemicals, sewage and fertilizers are
dropped and if it is not treated before
being discharged
into waterways,
serious pollution
is the result.

5. Types of water pollution
 Microbiological
Chemical
Oxygen-depleting Substances
Nutrients
Oil pollution

6. Microbiological
•Microbiological pollution is the natural form of
water pollution that is caused by microorganisms
in uncured water.
•Most of these organisms are harmless but some
bacteria, viruses, and protozoa can cause serious
diseases such as cholera and typhoid.
•This is a significant problem for people in third
world countries who have no clean drinking water
and/or facilities to cure the water.

7. Oxygen-depletion
pollution
•Many wastes are biodegradable, that
is, they can be broken down and used
as food by microorganisms like
bacteria.

8. Nutrients pollution
• • Nutrients are usually found in
wastewater and fertilizers. • These
can cause excess vegetation in the
water such as algae and weeds, using
up the oxygen in the water and
hurting the surrounding marine life
and other organisms in the water.

9. Chemical pollution
•Metals and solvents flow out of factories and into the
water, polluting the water and harming the wildlife.
• Pesticides from farms are like poison to the wildlife in
the water and kill and endanger the aquatic life.
•If birds or humans eat these infected fish the toxins are
transferred to us and we swallow these dangerous
pesticides and toxins, affecting our health.

10. CAUSES
Domestic households,
industrial and
agricultural practices
produce wastewater
that can cause pollution
of many lakes and
rivers.
Dumping of litter in the
sea can cause huge
problems in marine
animals and may result
in death .

11. Nuclear waste is
produced from
industrial, medical and
scientific processes
that use radioactive
material. Nuclear
waste can have
detrimental effects on
marine habitats

12. Effects of water
pollution
dead animals
•Dead plants
•harms the ecosystems
•heat waves
•Also climate change/global warming
•droughts
•more bugs
•more diseases

13. Effects of water
pollution
• •asthma
• •heavy breathing
• •cancer
• •acid rain
• •Each year about 250,000 people are
admitted to hospitals or emergency
rooms with pesticide poisoning

14. What can we do to
prevent water pollution?
• Be careful about what
you throw down your
sink or toilet.
• Use environmentally
household products,
such as washing
powder, household
cleaning agents and
toiletries.
• Don't throw litter
into rivers, lakes or
oceans.

15. Thank you forThank you for
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