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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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Technology uptake, costs, and benefits under a next-phase passenger car efficiency program in Brazil
Evaluates the level of technology adoption, costs, and efficiency improvement associated with alignment with the European Union’s 2021 emissions target of 95 gCO2/km (equivalent to 1.27 MJ/km) for new passenger cars in Brazil in...
White paper
Efficiency technology and cost assessment for U.S. 2025–2030 light-duty vehicles
Analyzes emerging vehicle-efficiency technologies with respect to cost and capacity to lower carbon emissions from passenger cars and light-duty trucks in the 2025–2030 time frame.  
White paper
China's Stage 6 emission standard for new light-duty vehicles (final rule)
The China 6 standard combines best practices from both European and U.S. regulatory requirements in addition to creating its own. This policy update provides detail on how this standard is unique, a comparison with emission...
Policy update
 

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The Staff

Anup Bandivadekar
Anup Bandivadekar
Program Director / India Lead
Yoann Bernard
Yoann Bernard
Real World Emissions Researcher
Jan Dornoff
Jan Dornoff
Vehicle Emissions Senior Researcher
John German
John German
Senior Fellow / US Co-Lead
Hui He
Hui He
Senior Policy Analyst / China Lead
Fanta Kamakaté
Fanta Kamakaté
Chief Program Officer
Peter Mock
Peter Mock
Europe Managing Director / EU Lead
Peter Slowik
Peter Slowik
Associate Researcher