Which fossil fuel is most widely used?

• A. Coal
• B. Oil
• C. Natural gas
• D. Propane

Answer: (C)

Natural gas is used most widely because it combines broad availability with easy distribution, high efficiency, and relatively clean combustion. It can be delivered through an extensive network of pipelines to homes, businesses, and power plants, making it convenient for heating, cooking, and generating electricity. Modern gas-fired power plants, especially combined-cycle designs, extract a lot of energy from the fuel efficiently, which helps keep costs down and usage high. In HVAC, gas furnaces and boilers are common for their fast heat response and good efficiency, contributing to widespread adoption. Propane serves areas without natural gas service but doesn’t match the reach of a large pipeline network. Coal and oil remain important in certain applications, but they face higher emissions and infrastructure limitations, which reduces their overall use compared with natural gas.