2. Pollution
Pollution
is the introduction of
contaminants into a natural environment
that causes instability; disorder, harm or
discomfort to the ecosystem, physical
systems or living organisms.
3. Types of Pollution
Air
Pollution
Water Pollution
Thermal Pollution
Soil Pollution
Radioactive Pollution
4. The Importance of Air
Other
planets have sunlight, but the Earth
is the only planet we know that has air
and water. Without air and water, the
Earth would be unable to sustain life.
Sustain: to continue
5. Air Pollution
Air
pollution occurs when the air contains gases,
dust, fumes in harmful amounts. That is, amounts
which could be harmful to the health or comfort
of humans and animals or which could cause
damage to plants and materials.
6. Causes of Air Pollution
1-Natural Sources
Volcanic eruptions
Forest fires
Pollen grains of
flower
2-Man-made
Sources
• Increase in
pollution
• Deforestation
• Burning of fossil
fuels and fires
• Wars
• Emission from
vehicles
7. Protecting Clean Water
Dirty
water is the world's biggest health
risk, and continues to threaten both
quality of life and public health. When
water from rain and melting snow runs off
roofs and roads into our rivers, it picks up
toxic chemicals, dirt, trash.
8. Sources of Water Pollution
Community
waste waters
Industrial wastes
Agricultural sources
Under ground water pollution
Thermal pollution
9. Soil Pollution
Soil
pollution results from the build up of
contaminants, radioactive materials, salts,
chemicals and cancer-causing agents.
Caused by dumping of wastes
agrochemicals and as indirect result of air
pollution.
10. Sources of Soil Pollution
Salination
Domestic wastes
Agricultural
wastes
11. Control of Soil Pollution
Proper
disposal od industrial wastes
Recycling and recovery of materials
Minimize the manufacture and use od
chemical fertilizers
12. Radioactive Pollution
It
is the physical pollution of air, water and
land through nuclear materials.
Radioactive materials that cause pollution
may be materials from commercial or
laboratory processes.
13. Sources
1-Man made Sources
Nuclear weapons
Reactors and nuclear fuel
Waste waters containing these wastes
X-rays used in medical practices
