«It's a combination of cleaner fuel, advancements to the engine, and the use of emissions control technology,» says Allen Schaeffer, executive director of the Diesel Technology Forum, an organization supporting the use of clean diesel technology. (scientificamerican.com)
VW had marketed these cars as using clean diesel technology that allowed owners to meet strict pollution limits while also achieving a higher fuel economy. (dotearth.blogs.nytimes.com)
The developers at Audi chose the world's cleanest diesel technology as the unit best befitting the Audi Sportback concept show car. (ausmotive.com)