MAN’S IMPACT ON THE ENVIRONMENT

Impact – influence, alter, effect

Positive and constructive Negative and destructive

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.

End

Positive Impact

Man-made Materials

Medical Advancement

Farming and

Breeding

Invention of machinery

Negative Impact

Global WarmingAirWaterLand

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Man-made MaterialsFarming & Breeding

New MachineryMedical Advancement

Air Pollution Land Pollution

FactoriesAutomobile

Improper Disposal of rubbish

Deforestation

Improper Disposal of toxic waste

Burning of trees

Global Warming

Water Pollution

Pesticides Oil Spillage

Improper disposal of rubbish into river

Untreated sewage

1. Air Pollution

Contaminants released into the atmosphere causingharm to the environment and organisms.

FactoriesAutomobile

Effects of Air Pollution

• Causes respiratory problems.

• Causes acid rain when pollutants dissolve in the rain.

• *Release of chlorofluorocarbons(CFCs) causes global warming.

2. Land Pollution

Pollutants or wastes are disposed on land causing harm to the environment and the organisms.

Burning of trees

Improper Disposal of rubbish

Improper Disposal of toxic waste

Effects of Land Pollution

• Land unsuitable for use.

• Soil unsuitable for farming and breeding.

• Toxic wastes may seep into water bodies causing water pollution.

3. Water PollutionContaminants are released into water bodies causing harm to the environment and organisms.

Water bodies: Oceans, Rivers and Drains

Pesticides

Oil SpillageImproper disposal of rubbish

into river

Untreated sewage

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.

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

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