Publications: Clean Air

2017.10.11

Addresses the opportunities for facilitating, and the barriers to financing, the transition to soot-free urban bus fleets in 20 megacities.

2017.08.31

Evaluates well-to-wheel greenhouse gas emissions from soot-free urban transit bus types in 20 megacities.

2017.05.15

Diesel vehicles in major markets produce over 50% more NOx than official certification limits indicate. Study links these excess NOx emissions to ~38,000 premature deaths worldwide in 2015—mostly in the EU, China, and India. 

2017.04.18

Compares the economic and environmental tradeoffs of switching from HFO to two alternative fuels, distillate fuel and liquefied natural gas (LNG), in the IMO Arctic, as defined in the IMO Polar Code.

2017.01.25

Characterizes the climate and health benefits of adopting world-class standards for new vehicle efficiency/CO2 and conventional pollutant emissions in all members of the G20 Transport Task Group.

2016.12.23

Evaluates alternative regulatory pathways for India’s agricultural tractors and construction equipment on the basis of air pollutant emissions.

2016.11.28

Presents a global strategy to reduce fine particulate (PM2.5) and black carbon emissions from the global fleet of on-road diesel vehicles by identifying 36 countries for immediate action.

2016.11.21

The European Commission has proposed the world’s toughest emission standards for non-road mobile machinery (NRMM), which will tighten restrictions and set stricter limits on emissions of particulate matter (PM).

2016.09.23

Assesses feasibility, benefits, and costs of phasing out HFC-134a from the Chinese LDV fleet, focusing on three alternatives—HFO-1234yf, HFC-152a and CO2 (R-744)—most likely to be adopted by automakers with a global supply chain.

2016.09.16

Current non-road regulatory programs lag behind comparable programs for on-road diesel engines, and are not stringent enough to compel the use of the best available technologies for the control of PM and NOx emissions.

2016.07.08

The goal of this new stage of standard is to reduce fuel consumption by about 15% in 2020 from the 2015 levels, in order to further reduce the gap between China and other more developed markets globally.

2016.06.13

The maximum benefits of a fleet modernization program can be achieved by conducting a subsidized scrappage program along with early adoption of BS VI standards starting as soon as 2019.

2016.05.18

Emissions from the diesel engines of these two key types of non-road mobile sources are expected to be significant, and will potentially have strong negative impacts on local air quality and health in India.

2016.04.22

This working paper details the differences in fuel specifications for commercial gasoline and diesel fuels in India and the EU, and assesses potential air pollutant emission impacts of these differences.

2016.04.22

The proposed BS VI standards are far-reaching in scope and incorporate substantial changes to existing Bharat Stage III and IV emission standards. Of particular note is the tightening of particulate matter (PM) mass emission limits and the introduction of particle number (PN) limits for light- and heavy-duty vehicles (LDV, HDV) fitted with gasoline direct injection (GDI) and compression ignition (CI), or diesel, engines. 

2016.03.11
To rectify the implementation and compliance issues associated with P-7 standards for heavy-duty vehicles in Brazil, quickly advancing to the next P-8 phase and aligning it with Euro VI standards is the most effective option.
2016.03.11

Under current regulatory standards, the wide commercialization of diesel cars would significantly increase NOX and PM2.5 emissions, contributing to poor air quality and adding 150,000 premature deaths through 2050. 

2016.03.10

Surveys diesel engine technologies, costs, pollutant emissions, and efficiency improvements in a manner that can help inform India's transition to more stringent vehicle emissions standards over the next five years.

2016.03.02

A primary analysis to estimate how improvements in engine and tire technologies will translate into fuel consumption reductions for representative HDV types in India.

2016.03.01

P-8 standards in Brazil are a highly cost-effective means of reducing the environmental impact of diesel HDVs in Brazil and timely action is of critical importance.

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