Green Car Congress

JANUARY 7, 2020

From 2007 to 2017, US NO x emissions dropped by more than 40%. EPA last revised NO x standards for on-highway heavy-duty trucks and engines in January 2001. The ANPR provides an opportunity for comment on the extent to which EPA should adopt provisions similar to those expected in the CARB Omnibus proposal.

EPA 150

EPA Ozone Clean Cleaning 150

Green Car Congress

NOVEMBER 14, 2018

The CTI will include a future rulemaking that will update the existing NO x standard which was last set in 2001 while also streamlining compliance and certification requirements. From 2007 to 2017, US NO x emissions dropped by more than 40%. EPA last revised NO x standards for on-highway heavy-duty trucks and engines in January 2001.

EPA 249

EPA Cleaner Standards 2001 249

Green Car Congress

SEPTEMBER 25, 2016

These were shown to be ozone-depleting, however, and were targeted for phasing out under the 1987 Montreal Protocol. China fully embraced HFC-134a in 2001 when it implemented its obligations under the 1987 Montreal Protocol. These older systems used chlorofluorocarbons (CFC-12) as the refrigerant gas.

China 150

China Ozone Chinese United States 150