EVS Chap-14 POLLUTION

CH-14

POLLUTION

KEY WORDS

pollution	garbage	decay	decibels
poisonous	chimneys	decompose	loudspeakers
smoke	residential	biodegradable	generators
emitted	dumping	typhoid	factories
carpools	chemicals	diarrhoea	deaf

Define the terms

1.     Pollution: Pollution is the presence or introduction into the environment of a substance or thing that has harmful or poisonous effects.

Q and A

Q-1 How is noise pollution caused?

A-1 Noise pollution is caused by:

1.     Horns of vehicles.

2.     Buzzers and hooters of factories.

3.     Noises of people in the markets.

4.     High volumes of TV and radio sets.

5.     Jugging sound of scooters and generators.

6.     Blaring of loudspeakers.

  Q-2 What are the effects of air pollution?

Ans-2 Air pollution causes

1.     Irritation in the throat, nose, lungs and eyes.

2.     It causes breathing problems.

3.      Respiratory and heart problems.

4.      Global warming

                   Q-3 List the ways by which we can prevent water

                   pollution.

                    Ans-3 Some ways to prevent water pollution are as

                    follows:

1.     Avoid washing clothes and utensils in water bodies.

2.     Dirty water from factory should not be released in water

bodies.

3.     Do not pour oil or grease and stop dumping garbage

Like plastic in water.

                  Q-4 Differentiate between biodegradable waste and

                   non-biodegradable waste.

Biodegradable waste	Non-biodegradable waste
Things such as fruit and vegetable peels, paper get decayed easily and get mixed with the soil are known as biodegradable waste.	Things such as plastic, metal, glass and rubber do not decompose and remain in the soil for longer period of time, thus polluting land are known as non biodegradable waste

                                     

  Extra Questions

Q-1What causes air pollution?

A-1Air pollution is caused due to smoke emitted

from motor vehicles, cigarettes or factories.

Q-2.How can we prevent land pollution?

A-2 We can prevent land pollution by using

biodegradable materials.

Q-3. How does noise pollution affect humans?

A-3 Noise pollution affects human nerves and can

make a person, particularly a newborn deaf or dumb.

Homework

Q-4. Name any two activities that cause water

 pollution.