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Low-carbon technology pathways for soot-free urban bus fleets in 20 megacities

Urban transit bus fleets are a significant source of air pollutant emissions, including black carbon, a harmful ultrafine particle and potent short-lived climate pollutant. Transit bus fleets are...
Published 2017.08.31: Publication

Impacts and mitigation of excess diesel NOx emissions in 11 major vehicle markets

A new study published online May 15 in the journal Nature quantifies the global health and environmental burden of real-world diesel NOx emissions in 11 major vehicle markets. The study found that...
Published 2017.05.22: Event

Impacts and mitigation of excess diesel NOx emissions in 11 major vehicle markets

Access publication here: Nature, 25 May 2017, doi:10.1038/nature22086 Nitrogen oxide (NOx) emissions from diesel cars, trucks, and buses are a major contributor to air pollution-related deaths...
Published 2017.05.15: Publication

Impacts of world class vehicle efficiency and emissions regulations in select G20 countries

In 2014, the G20 Energy Efficiency Action Plan prioritized the establishment of a Transport Task Group (TTG) to promote cooperation among participating G20 countries to develop domestic policies that...
Published 2017.01.25: Publication

Technology pathways for diesel engines used in non-road vehicles and equipment

Internal combustion engines are ubiquitous in today’s society. Applications for these engines cover a broad spectrum, ranging from vehicles that transport passengers and move goods to specialized...
Published 2016.09.16: Publication

China's latest step forward on vehicle emissions regulation

On June 6–7, the Eighth Round of the U.S.–China Strategic and Economic Dialogue was held in Beijing. The two nations are making remarkable progress toward reducing the environmental and energy impact...The newly announced implementation timeline of the China 6/VI vehicle emission standard will accelerate the introduction of the most stringent emission reduction requirements and advanced emission...
Published 2016.07.11: Blog Post

广东省在用车排放控制方案评估与分析比对报告

控制在用车排放,特别是高排放的老旧车辆,能够快速有效的缓解城市空气污染。 随着中国空气质量改善压力的与日俱增,为减少使用机动车对环境所造成的影响,广东省已经采取了多种方法来减少现有的在用车排放。 广东各市都根据自身的特殊情况和需求,因地制宜的制订出了不同的管理方案。目前,广东省比较普遍的在用车排放控制措施包括通过I/M管理、遥感监测、现场检测、公众监督等手段开展在用车达标管理;推广使用清洁燃料...
Published 2015.06.30: Publication

Costs and benefits of motor vehicle emission control programs in China

China has made tremendous progress in emission control for on-road vehicles (light-duty vehicles, buses, and heavy-duty trucks) in recent decades. The vehicle population in China grew nearly...
Published 2015.06.29: Publication

Review and comparative analysis of in-use vehicle emission control programs in Guangdong Province

Controlling emissions from the in-use fleet, particularly from high emitters and older vehicles, can immediately alleviate urban air pollution. As pressure to address China's air quality issues...
Published 2015.06.29: Publication

Policies to reduce fuel consumption, air pollution, and carbon emissions from vehicles in G20 nations

The transport sector consumes more than half of global oil production, and releases nearly a quarter of all anthropogenic carbon dioxide emissions. Motor vehicles and engines contribute to ambient...
Published 2015.06.08: Publication

Want to help China's smog problem? Some lessons learned from the U.S. Clean Air Act

Over the past two weeks, former CCTV reporter Chai Jing’s documentary “Under the Dome – Investigating China’s Smog” caused a sensation in China and the rest of the world. We were (naturally)...China is in the process of amending its Clean Air Law. Experience with the CAA highlights some key principles that can help give environmental agencies the teeth they need.
Published 2015.03.13: Blog Post

Comparing real-world off-cycle NOx emissions control in Euro IV, V, and VI

Heavy-duty vehicles built and certified in conformity to Euro IV and V emissions standards frequently do not achieve the real-world NOx emissions expected under those standards. Now data is becoming...
Published 2015.03.02: Publication

CCAC Green Freight Call to Action

The High Level Assembly of the Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutants (CCAC) met in Warsaw on November 21, one of the events during the recently concluded COP19....
Published 2013.12.05: News

What might US-China collaboration on clean fuels and vehicles focus on?

My colleague Nic Lutsey recently blogged about a new development in US-China climate collaboration: a focus on improving the efficiency of heavy-duty trucks. Trucks are a large and growing...The US-China Climate Change Working Group also has great potential to deliver direct health benefits beyond its climate change mitigation impact.
Published 2013.08.02: Blog Post

Cleaning up the diesel vehicles already on the road

Older diesel vehicles are prime culprits when it comes to both urban air pollution and climate change. Although they usually make up only a small percentage of all the vehicles in a region, they...Old diesel vehicles are prime culprits when it comes to both urban air pollution and climate change. Although they usually make up only a small percentage of all the vehicles in a region, they can...
Published 2013.08.02: Blog Post

Best practices in emission control of in-use heavy-duty diesel vehicles

This report summarizes policy approaches to controlling in-use emissions from heavy-duty vehicles (HDVs), including freight trucks, buses, municipal government and other service fleets. HDVs, while...
Published 2013.08.02: Publication