Which of the following options explains a significant disadvantage of using fossil fuels as energy sources?

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It releases harmful gases into the atmosphere when burnt

It is extracted from deep inside the Earth

It uses oxygen in the process of burning

It is hard to transport

answer is A.

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Detailed Solution

Fossil fuels, including coal, oil, and gas, have been the primary sources of energy for various purposes. However, their use has significant drawbacks. The burning of fossil fuels releases harmful gases such as carbon dioxide, sulfur dioxide, nitrogen oxides, and particulate matter into the atmosphere, causing air pollution and contributing to climate change.

Although fossil fuels are located deep within the Earth, it is a characteristic of fossil fuels rather than a disadvantage. Extraction can be challenging and expensive, but this fact alone does not make them disadvantageous. Therefore, option B is incorrect.

Using oxygen to burn is not unique to fossil fuels; all fuels that require oxygen will consume it during combustion.

While transporting fossil fuels can be challenging, it can be done using pipelines, tankers, and trucks.

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