Question

which of the following fossil fuels causes the least environmental problems? select one: a. oil b. coal c. tar sands d. natural gas

Explanation:

Natural gas burns more cleanly than oil, coal, and tar - sands. It produces less carbon dioxide per unit of energy compared to coal and oil, and fewer pollutants such as sulfur - dioxide and particulate matter. Tar sands are particularly environmentally damaging due to their extraction process.

Answer:

D. natural gas