Q.Write a short note on 'Alkali soil'.

Acid rain results from air pollution, so the answer is (b).

In the environmental economics topic of the Tamil Nadu HSC Commerce syllabus, environmental degradation is studied by its types — air, water, land and noise pollution.

Acid rain is caused by air pollution. When fossil fuels are burnt in industries and vehicles, gases such as sulphur dioxide (SO2) and nitrogen oxides (NOx) are released into the atmosphere. These gases react with water vapour and oxygen in the air to form sulphuric and nitric acids, which then fall to the earth as acid rain. Ac …

Alkali soils are predominantly located in the Indus-Ganga plains — option (c).

In the Tamil Nadu HSC Class-12 Economics (Environmental Economics) syllabus, land/soil degradation is one form of environmental degradation. Alkali (alkaline/sodic) soils, which suffer from a high concentration of sodium …

Hearing loss is an effect of noise pollution.

Noise pollution is the presence of excessive, unwanted sound in the environment, from sources such as traffic, industries, loudspeakers, construction and machinery. Continuous exposure to high levels of noise damages the ear and leads to partial or total hearing loss, besides causing stress, sleep disturbance and high blood pressure.

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Acid rain is caused by polluting gases in the air, so it is a consequence of air pollution — option (b).

Acid rain occurs when gases like sulphur dioxide (SO2) and nitrogen oxides (NOx), emitted mainly by burning fossil fuels, rise into the atmosphere and react with water vapour to form sulphuric and nitric acids. These fall to the earth as acidic rain, harming soil, water bodies, plants and buildings. Because the pollutants are in the …

Increasing temperature is associated with global warming.

Global warming is the gradual rise in the average temperature of the Earth's atmosphere and oceans, caused mainly by the greenhouse effect from gases such as carbon dioxide, methane and CFCs. It leads to melting glaciers, rising sea levels and climate change. Among the options given, only 'increasing temperature' r …