1. MAN’S IMPACT
ON THE
ENVIRONMENT

2. Impact – influence, alter, effect
Positive and constructive Negative and destructive

3. 1) Write two headings on the cardboard.
(Positive Impact) & (Negative Impact)
2) Look at the pictures and arrange them according to
what you think is positive and negative.
3) Remember, arrange based on what you see only.
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6. Invention of Positive Impact
machinery Farming
and
Breeding
Medical Man-made
Advancement Materials
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Global Warming
Land Water Air

7. Man-made Materials
Farming & Breeding
New Machinery
Medical Advancement

8. Air Pollution Land Pollution
Factories
Automobile Deforestation
Improper Disposal
of rubbish
Global Warming
Burning of trees
Improper Disposal
of toxic waste

9. Water Pollution
Pesticides Oil Spillage
Improper disposal of rubbish Untreated sewage
into river

10. 1. Air Pollution
Contaminants released into the atmosphere causing
harm to the environment and organisms.
Factories
Automobile

11. Effects of Air Pollution
• Causes respiratory problems.
• Causes acid rain when pollutants dissolve in the rain.
• *Release of chlorofluorocarbons(CFCs) causes
global warming.

12. 2. Land Pollution
Pollutants or wastes are disposed on land causing
harm to the environment and the organisms.
Burning of trees
Improper Disposal Improper Disposal
of rubbish of toxic waste

13. Effects of Land Pollution
• Land unsuitable for use.
• Soil unsuitable for farming and breeding.
• Toxic wastes may seep into water bodies causing
water pollution.

14. 3. Water Pollution
Contaminants are released into water bodies
causing harm to the environment and organisms.
Water bodies: Oceans, Rivers and Drains
Untreated sewage
Pesticides
Improper disposal of rubbish
Oil Spillage

15. Effects of Water Pollution
• Harms coastal wildlife (e.g. birds covered with oil)
• Harms or kills marine life.
• Causes stagnant water which encourages
breeding of mosquitoes.

17. 1. List 2 positive impact of Science and Technology.
(i) Medical advancement/New machinery
(ii) Farming and breeding/Man-made materials
2. What are two sources of air pollution?
Factories and automobiles.
3. State two effects of land pollution.
(i) Land unsuitable for use/Toxic waste may seep into the
water bodies causing water pollution.
(ii) Soil becomes unsuitable for farming and breeding.
4. What type of gas when released into the atmosphere causes
global warming?
Chlorofluorocarbons/CFCs

18. Find out how Singapore does the following.
a) Treats contaminated water
b) Disposes waste
c) Reduces air pollution
Useful keywords to help in your research:
-National Environment Agency
-Singapore Environment Council