Start your engines. (catalysis) 160304

 As the Volkswagen scandal showed, building fuel-efficient, low-emitting vehicles is no easy task.


Volkswagen is still reeling from the U.S. Environmental Protection Agency's revelation that the


carmaker had altered diesel engines to beat emissions test , which caused immediate consumer


outrage . the agency reports that some diesel-powered vehicles made by Volkswagen and its


subsidiaries Audi and Porsche contained software that lowered emissions during test but not during


normal driving. On the road , some vehicles emitted up to 40 time as much NOx -a combination


of nitric oxide and nitrogen dioxide--as allow .


From : CEN JUNE 6,2016


在这以前, CEN 曾以封面标题有关汽车尾气的处理, 也是加urea并催化.