Fuel cells offer several advantages: they do not have moving parts and there is no burning involved, so there are negligible emissions of environmentally harmful gases like nitrogen, sulfur oxide and carbon monoxide.

FORBES: Magazine Article

If we believe environmental activist claims that carbon monoxide, nitrogen oxides, sulfur dioxide, mercury, and particulate emissions to say nothing of global warming and carbon dioxide emissions are so bad for human health, natural gas production should be a no-brainer.

FORBES: The Sierra Club Fails An Environmental Consistency Test

For important pollutants monitored by the EPA, natural gas power cuts carbon monoxide emissions by 81%, nitrogen oxide emissions by 80%, sulfur dioxide emissions by 99%, mercury emissions by 100%, and particulates by 99%.

FORBES: The Sierra Club Fails An Environmental Consistency Test