Answer the following question given this paragraph: Natural gas burns cleaner than other fossil fuels. As a result, it causes less air pollution. It also produces less carbon dioxide than the other fossil fuels. Because it burns cleaner than other fossil fuels, natural gas has a good reputation. Still, natural gas does emit pollutants. Q: Natural gas burns cleaner and produces less carbon dioxide than fuels of what type? Choices: - renewable fuels - solar energy - biofuels - fossil fuels A:
A:
fossil fuels