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The reductions in passenger vehicle emissions that have been achieved since the mid-twentieth century are a great environmental success story. Government regulation of tailpipe emissions and private investments in breakthrough technologies such as the three-way catalytic converter have reduced emissions of nitrogen oxides, carbon monoxide, and hydrocarbons by 75 to 90 percent at a relatively small cost to consumers. Since California first established emission standards for passenger vehicles in the 1960s, different regulatory approaches have been adopted by the United States, Japan, and Europe, and each has been emulated to some degree in other parts of the world. Significant work remains to replicate these successes throughout the rest of the global fleet.

The massive impact of passenger vehicles on climate also remains to be addressed. The transportation sector is responsible for about one-quarter of energy-related greenhouse gas emissions worldwide. Passenger vehicles account for just under half of this total, and will remain the predominant source of these emissions for the foreseeable future.

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Early adoption of China 5/V vehicle emission standards in Guangdong
Guangdong province becomes the third region in China to move from China 4/IV to China 5/V standards on an advanced schedule, though with a 9- to 12-month postponed timeline announced on March 27, 2015.
Policy update
Japan light commercial vehicle fuel economy standards for 2022
New standards require that the fuel economy of MY 2022 LCVs sold in Japan average 17.9 km/L, compared to 14.2 km/L in 2012—a 26% increase in fuel economy, and a 23% increase from the 2015 standard of 14.5 km/L.
Policy update
Accelerating progress from Euro 4/IV to Euro 6/VI vehicle emissions standards
Details options for and benefits of leapfrogging the Euro 5/V LDV/HDV vehicle emissions standards, and instead progressing directly from Euro 4/V to Euro 6/VI.
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The Staff

Anup Bandivadekar
Anup Bandivadekar
Program Director / India Lead
John German
John German
Senior Fellow / US Co-Lead
Hui He
Hui He
Senior Policy Analyst / China Co-Lead
Fanta Kamakaté
Fanta Kamakaté
Chief Program Officer
Peter Mock
Peter Mock
Europe Managing Director / EU Lead