Which of the following is the cleanest fossil fuel?Select one:a.Liquefied petroleum gasb.Petroleumc.Coald.Natural gas

Answer

Among the options provided, d. Natural gas is considered the cleanest fossil fuel.

Explanation

Natural gas produces the least amount of carbon dioxide (CO₂) when burned, compared to other fossil fuels. It emits fewer pollutants, such as sulfur dioxide (SO₂) and particulate matter, making it a cleaner source of energy.

In contrast:

• a. Liquefied petroleum gas (LPG) is cleaner than petroleum and coal but does have emissions.
• b. Petroleum produces higher emissions of CO₂ and other pollutants.
• c. Coal is the dirtiest of the fossil fuels, releasing significant amounts of CO₂ and other harmful pollutants, including mercury.

Thus, natural gas is often viewed as a transition fuel towards renewable energy sources due to its lower environmental impact.