environmental science 7

1. MELTING ICE
CAPS
FOREST
DAMAGED BY
ACID RAIN
LAND SCARRED
BY EROSION

2. “ENVIRONMENTAL
CHARADES”

3. 1. The river is full of dead fish.
2. The hillside soil slides down after heavy rain.
3. People in the city are coughing and wearing masks.
4. Crops in the farm turn yellow and die after rainfall
5. Students cannot concentrate because of loud construction
nearby.

4. 6. The summer feels hotter than before, even at night.
7. The protective layer in the atmosphere is thinning.
8. Trash is floating in the ocean and harming sea turtles.
9. Farmers lose fertile soil after cutting trees on hillsides.
10.People complain of headaches from constant car horns.

5. 11.The sky looks gray instead of blue in the city.
12.Children develop skin problems after swimming in dir
13.Forests are disappearing and animals lose their home
14.Old spray cans and refrigerators release harmful gase
15.Heavy smoke from burning coal makes breathing diffi

6. ENVIRONMENTA
L PROBLEMS
AND THEIR
IMPACTS

7. 1. GREENHOUSE
EFFECT
• Caused by gases like CO , CH , and N O trapping
₂ ₄ ₂
infrared radiation.
• Leads to global warming, rising sea levels, melting
ice caps, and extreme weather events.
• Potential consequences include flooding of coastal
cities and islands, and increased droughts and
storms.

8. 2. ACID
RAIN
• Results from SO and NO reacting with water
₂ ₓ
and oxygen to form acids.
• Occurs via wet deposition (rain, fog, snow) and
dry deposition (acidic gases and particles).
• Damages ecosystems, buildings, and human
health.
• Measured using the pH scale: lower pH indicates
higher acidity.

9. 3. OZONE LAYER
DEPLETION
• Allows harmful UV radiation to
reach Earth, increasing risks of
skin cancer and immune
suppression.
• Solutions include avoiding
Styrofoam and reducing vehicle
emissions.
• Caused by CFCs found in
Styrofoam, refrigerants, and
cleaning agents.
•

10. 4.POLLUTI
ON
• Air pollution stems from vehicle emissions,
industrial activities, and fossil fuel
combustion.
• Water pollution arises from direct discharges
(factories, treatment plants) and indirect
sources (agriculture, atmospheric fallout).
• Leads to toxic drinking water,
bioaccumulation in food chains, and
ecosystem damage.

11. 5. NOISE
POLLUTION
• Comes from traffic, industry, and urban
activities.
• Causes sleep disturbance, stress, hearing
loss, and other health issues.
• Major sources include road traffic,
neighborhood noise, and construction.

12. 6. SOIL EROSION
• Accelerated by water, wind, and human activities like
deforestation, overgrazing, and poor farming practices.
• Results in loss of fertile soil, crop damage, infrastructure
degradation, and desertification.
• Natural factors:
• heavy rains, drought, steep slopes.
• Human factors:
• land clearing, intensive agriculture, urban development

13. Solution and
Remediation
• Energy conservation: turn off unused appliances, use
efficient devices, carpool.
• Pollution reduction: recycle, reduce packaging,
responsible chemical disposal.
• Acid rain mitigation: clean smokestacks, use alternative
energy, conserve energy.
• Ozone protection: avoid CFCs, use public transport,
plant trees.
• Soil erosion control:

14. RIPARIAN FENCING GRASSED WATERWAYS

15. TREE PLANTING DEBRIS DAM

16. RETIREMENT
FENCING
TOP DRESSING WITH
FELTILIZER

17. 1. Cause: Water pollution
2. Cause: Deforestation / Soil erosion
3. Cause: Air pollution
4. Cause: Acid rain
5. Cause: Noise pollution
6. Cause: Greenhouse effect / Climate change
7. Cause: Ozone depletion from CFCs

18. 8. Cause: Improper waste disposal / Water pollution
9. Cause: Soil erosion
10. Cause: Noise pollution
11. Cause: Air pollution from vehicles/factories
12. Cause: Water pollution
13. Cause: Deforestation
14. Cause: Ozone depletion (CFCs)
15. Cause: Air pollution / Fossil fuel burning

19. ACTIVITY:
1. What is the significant difference between
a global environmental problem (like
green house effect) and a local problem
(like noice pollution)?
2. List 2 solutions how to avoid pollution?