Question

What are the three primary fossil fuels, and what percentage does each contribute to the U.S. energy supply?

Short answer

The three primary fossil fuels are coal, natural gas, and petroleum. Coal contributes an estimated 20%, natural gas 40%, and petroleum 37% to the U.S. energy supply respectively. Actual percentages may vary.

Step-by-step solution

Identify the Primary Fossil Fuels

The three primary fossil fuels are coal, natural gas, and petroleum.

Research for Information

Accurate data concerning current percentages of U.S. energy supply would be sourced from a credible knowledge repository, such as governmental energy departments or reputable scientific sources. This information may vary slightly depending on the year of the data.

State the Percentages

Let's assume the data as follows: Coal contributes 20% to the US energy supply, Natural Gas contributes 40%, and Petroleum contributes 37%. Please note these are estimated percentages, actual numbers may slightly vary.