SCIENCE FORM 1 CHAPTER 7 (7.3)

CHAPTER 7:

Air

7.3 Air pollution

Unwanted substances in the air that
are harmful to living things and
environment

Common air pollutants are dust,
carbon monoxide, lead,
chlorofluorocarbon (CFC), pesticides

SOURCES OF AIR POLLUTION

SOURCES OF AIR POLLUTION

Open burning

EFFECTS OF AIR POLLUTION

1. Health problem –asthma, lung cancer, headache, death

EFFECTS OF AIR POLLUTION

2. Building and infrastructures – Acid rain corrodes
concrete/limestone buildings, speeds up iron rusting

EFFECTS OF AIR POLLUTION

3. Plants and animals –Depletion/damage of food resources
(water acidic, smoke decrease sunlight reaching to earth)

EFFECTS OF AIR POLLUTION

4. Climate–haze, greenhouse effect, thinning of ozone layer
and acid rain

EFFECTS OF AIR POLLUTION

4.1 HAZE -the visiability distance is limited / shorter

EFFECTS OF AIR POLLUTION

4.2 GREEN HOUSE EFFECT= carbon dioxide INCREASE

GREENHOUSE EFFECT

Green house gases trap the heat.
 Will warm the earth
 Will increase the earth

temperature

GLOBAL
WARMING

GLOBAL WARMING

Climate change Drought

EFFECTS OF AIR POLLUTION

4.2 THINNING OZONE LAYER
= Chlorofluorocarbons (CFCs) INCREASE

WAYS TO PREVENT AND CONTROL AIR POLLUTION

1. Law enforcement–fine smokers, fine person who conduct
open burning, prohibit factories (away from housing area)

WAYS TO PREVENT AND CONTROL AIR POLLUTION

2. Education – educate effect/way to prevent air pollution,
organize campaign, encourage usage of public transport

WAYS TO PREVENT AND CONTROL AIR POLLUTION

3. Sciece and technology – implement hybrid technology,
choose HCFC refrigerator, install filter in smoke chimneys

4. Do not burn forests

5. Reforestation