Liquid fuels are substances that can be burned to produce energy, typically in the form of heat or power. Common examples include gasoline, diesel, and kerosene. These fuels are derived from fossil sources like oil and coal, and they play a crucial role in transportation, heating, and electricity generation. The use of liquid fuels has both advantages and disadvantages. They are convenient and energy-dense, making them ideal for vehicles like cars and trucks. However, burning these fuels releases carbon dioxide and other pollutants, contributing to climate change and air quality issues. As a result, there is a growing interest in alternative energy sources.