What is/are disadvantage(s) of using fossil fuels?

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Burning fossil fuels causes air pollution

Burning of fossil fuels releases acidic oxides which lead to acid rain

Fossil fuels are not burnt completely; they leave ashes after burning

All of the above

answer is D.

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Detailed Solution

The correct option is 4.
The excess heat and pressure inside the earth lead to the burning of plants and animal waste inside the earth and form fossil fuels. These fossil fuels are burnt to get energy. Examples of fossil fuels are coal, petroleum, and natural gas. However, burning fossil fuels causes air pollution as it releases acidic oxides, which may lead to acid rain. Acid rains damage the fertility of the soil. Hence, some measures are taken to reduce fossil fuels due to their disadvantages, like using CNG, LPG, etc.

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