Mark the following statements as true or false. Correct the false statements.
(a) Water pollution is caused by the smoke given out by factories.
(b) Pesticides and fertilisers cause both soil and water pollution.
(c) Breathing in suspended particulate matter is not as harmful as breathing in carbon dioxide.
(d) Fertilisers provide nutrients to the soil, therefore they cannot be replaced.
(e) There are no alternatives for fossil fuels.

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Solution

(a) False

Smoke given out by factories causes air pollution.

(b) True

(c) False

Breathing in suspended particulate matter is as harmful as breathing in carbon dioxide. It may lead to various respiratory problems, such as asthma.

(d) False

Fertilisers can be replaced by natural, organic products called manure, which provides nutrients to the soil.

(e) False

Solar, wind, hydro and nuclear energy can be used as alternatives to fossil fuels.

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(d) CNG is more polluting than petrol.

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A: Biofertilisers can be used to improve the yield of a plant.

B: Substances applied to soil or directly onto plants to provide nutrients for their growth and development are called fertilisers.

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(a) We can survive for some time without air but we cannot survive even for a few minutes without food.
(b) A brick kiln emits a lot of smoke and other harmful gases causing air pollution.
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