Future versions, they believe, should also be able to cope with pollutants that do not contain carbon, such as oxides of nitrogen.

ECONOMIST: Diesel engines

Natural gas power emits merely 20% of the carbon monoxide of coal power, 20% of the nitrogen oxides of coal power, less than 1% of the sulfur dioxide of coal power, less than 1% of the particulate matter of coal power and less than 1% of the mercury of coal power.

FORBES: New Emissions Data Dampen Global Warming Fears

They promise lower emissions of nitrogen oxides, sulfur oxides, particulate matter, and carbon dioxide (CO2).

FORBES: Never Mind Solyndra: Fuel Cell Industry Growing with Government Support

It must implement regulations that capture the environmental benefits of nuclear, such as low emissions of carbon dioxide as well as nitrogen and sulfur oxides.

WSJ: The Experts: What's the Best Way Forward on Nuclear Power?

These include Yuri Suzuki, a materials scientist at the University of California, Berkeley, who is building stacks of metal oxides in the hopes that, when combined with carbon-based materials, they'll blend into a new kind of semiconductor that can control spin at normal temperatures.

FORBES: Magazine Article

Automakers already strip lots of other pollutants from cars, such as the nitrogen oxides that contribute to smog, and carbon monoxide, which is poisonous.

NPR: Has the Move to Make Cars Greener Stalled?