This document provides information about pollution in 3 main categories: land, air, and water pollution. It defines each type of pollution and discusses their causes and effects. Land pollution is caused by dumping of waste and chemicals in the soil, which damages ecosystems and harms plants. Air pollution stems from burning fossil fuels and industrial emissions, endangering human health and the ozone layer. Water pollution results from untreated sewage and waste mixing with oceans and rivers, spreading diseases and impacting wildlife. Reducing pollution requires proper garbage disposal and increasing green spaces.

1. How to teach science?
Class Presentation
Topic:
pollution
by
Huma nasir

3. Pollution
• Pollution is unwanted, harmful stuff
contaminating an environment.
• The race to develop clean energy is
motivated by high levels of pollution that
people fear are permanently damaging the
earth’s environment.

4. Air Pollution
Soil Pollution
Water Pollution
TYPES OF
POLLUTION

5. LAND POLLUTION
• LAND pollution means the pollution of the Earth
by solid and liquid waste which is produced as a
result of human activities.
• Causes
• Chemical waste produced by factories ,human
sewage dumping into the ground
• When waste is not properly disposed of it causes
land pollution

6. Effects:
• Land pollution not only damages the soil, it
also has very harmful effects on the entire’
“Eco system”.
• When Toxic chemicals are dumped onto the
ground, they get absorbed into the soil which
is harmful for plants.

7. Air pollution
• When reading about air; you
learned that air is a mixture of
gases. Any human activity that
causes disturbance in this
composition of gases can create
air pollution
• Causes :
• Main cause of air pollution are
smoke from traffic and the
burning of fossil fuel ,such as coal
,gas ,and oil .

8. • Smoke from factories and industries makes the
air impure
• Effects:
• Air pollution damages the Ozone Layer which
protects the Earth from the harmful rays of the
Sun
• Air pollution is harmful for human health,
breathing in polluted air can cause many
breathing disorders like asthma and Bronchitis.

9. Water pollution
• Water pollution is very important for all the life forms
on earth 70% of the surface is covered by water .
• Clean and pure water is need of every human being .
• Most of the water in the rivers, lakes and seas is now
polluted due to human activities
• CAUSES
• Some of the biggest source of water pollution are
untreated human sewage ,fertilizer and industrial
waste.
• They mix with water of oceans, rivers and makes the
water impure for humans and living things.

10. Water pollution
• EFFECTS
• Polluted water is very harmful for human
health and the natural environment. .
• It is unhealthy for drinking and for other uses.
• Dirty water contain many diseases in human
body.
• Sea animals are effected by the water
pollution.

11. Reducing pollution
• Do not throw garbage into the river
• Plants more trees
• Dispose of litter and garbage properly

12. THANK YOU