The introduction of harmful waste materials that are hazardous to life, the natural world
and our activities, is commonly known as pollution. Pollution has harmful effects on the
ecosystem. It disturbs the balance of biosphere in which living beings survive.
2. This imbalance of oxygen, nitrogen, carbon dioxide, argon and water vapour causes
discomfort to all living organisms on the planet. It depletes the ozone layer over the earth that
defends us from the damaging ultraviolet rays of the sun. The major types of environmental
pollution are air pollution, water pollution, noise pollution, thermal pollution, soil pollution
and light pollution.
3. Environmental pollution is caused by deforestation and hazardous gaseous emissions Air
pollution is caused by the smoke emitted by cars, buses, trucks, trains and factories. This is
known to cause lung cancer, asthma, allergies, and various skin and breathing problems along
with severe and irreparable damage to flora and fauna. Water pollution is caused when
industrial waste products are released into lakes, rivers, and other water bodies. This is
destructive for the marine ecosystem. Noise pollution is caused by loud noises from aircraft,
cars, buses and trucks, vehicle horns, loudspeakers and industry noise.
Soil pollution is a result of acid rain, polluted water, fertilizers, etc. In short, this occurs when
chemicals are released into the soil. Light pollution includes use of excess lighting
equipment. The excessive and inappropriate artificial light causes several phenomena that
decrease visibility and cause visual discomforts like glare, urban sky glow2 and light
trespass}. Light pollution is a great hindrance to astronomy as it has become increasingly
difficult to view the night sky because of interference from artificial light.
4. The last decade has witnessed an alarming rise in environmental pollution. This problem is
even more alarming as this has caused irreparable damage to the earth.
Answer the following question:
1. What is pollution? (1m)
2. How does pollution affect the environment? (2m)
3. How does the reduction of the ozone layer affect us? (2m)
4. Mention four different kinds of pollution. (2m)
5. What are the two chief causes of environmental pollution? (2m)
6. What is the main cause of water pollution? (2m)
7. Mention any two causes of noise pollution. (2m)
8. What is the most disturbing consequence of increasing pollution? (2m)
Answers
Answer:
1-THE INTRODUCTION OF HARMFUL WASTE MATERIALS THAT ARE HAZARDOUS TO LIFE,THE NATURAL WORLD AND OUR ACTIVITIES IS COMMONLY KNOWN AS POLLUTION
2-It disturbs the balance of biosphere in which living beings survive
(b)This imbalance of oxygen, nitrogen, carbon dioxide, argon and water vapour causes
discomfort to all living organisms on the planet.
3- It depletes the ozone layer over the earth that
defends us from the damaging ultraviolet rays of the sun.
4-AIR POLLUTION
WATER POLLUTION
SOIL POLLUTION
NOISE POLLUTION
5-Environmental pollution is caused by deforestation and hazardous gaseous emissions
6-Water pollution is caused when
industrial waste products are released into lakes, rivers, and other water bodies. This is
destructive for the marine ecosystem
7-Noise pollution is caused by loud noises from aircraft,
cars, buses and trucks, vehicle horns, loudspeakers and industry noise.
8-The last decade has witnessed an alarming rise in environmental pollution. This problem is
even more alarming as this has caused irreparable damage to the earth.
THANKYOU.