The carbon capture and storage technology can strip carbon from fossil fuel exhaust gases and store it in rocks, but it is unproven at scale, trials are years behind schedule and it may not work in some areas of the world.

BBC: Firms 'own unburnable fossil fuels'

The idea is to strip carbon dioxide--a greenhouse gas--out of the smokestack.

FORBES: Rocket Science

The money it makes from fertilizer would offset the 72 megawatts of electricity needed to strip out the carbon, compress it and pump it out to sea.

FORBES: Technology

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?