Unveiled at last month’s SAE Congress in Detroit, which showcased some exciting green trends in the automotive industry, BMW stole the show with this incredible break-through. BMW’s carbon cutting sedan features a six-liter hydrogen combustion engine that delivers performance on par with its gas-guzzling counterpart.

What does this mean? It means the engine breaks down or converts more carbon monoxide than it takes in. Tested by Argonne Laboratories, emissions results show a similar reduction in non-methane organic gases. The emissions turn out to be so low that standard automobile emissions testing wouldn’t have detected them.

The demo BMW vehicle uses a 6-liter combustion engine that uses hydrogen as fuel, burning it in cylinders and delivers are performance similar with standard gas-powered 7-series, says BMW. The car manufacturer has been handing its Hydrogen 7 sedan, a car with dual-fuel hydrogen and as system, to celebrities and decision influencers, such as J.D. Power III. BMW doesn’t consider the vehicle to a prototype and unfortunately won’t be building more on the same scale as the Hydrogen 7.