GEOLOGY

Detailed explanation-1: -Fossil fuels, such as coal, natural gas and oil, are examples of non-renewable energy sources.

Detailed explanation-2: -Although natural gas is a proven, reliable alternative fuel that has long been used to power natural gas vehicles, only about two-tenths of 1% is used for transportation fuel.

Detailed explanation-3: -Fossil fuels are the largest sources of energy for electricity generation. Natural gas was the largest source-about 38%-of U.S. electricity generation in 2021. Natural gas is used in steam turbines and gas turbines to generate electricity.

Detailed explanation-4: -Alternative energy here includes hydroelectric energy, solar energy, geothermal energy, wind energy, nuclear energy, and biomass energy. The data come from the World Bank.