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In early 2020, UK-based independent testing firm Emissions Analytics published a study claiming that tire particulate wear emissions were 1,000 times worse than exhaust emissions ( earlier post ). —Emissions Analytics. Quoting such ratios, however, needs careful interpretation.
Data from the ESA’s Tropomi (TROPOspheric Monitoring) instrument on board the Copernicus Sentinel-5P satellite shows the variation of nitrogen dioxide (NO 2 ) emissions over China from December to March. The drop in emissions also coincided with Lunar New Year celebrations, which usually sees a similar drop in emissions each year.
The study, set in Singapore, suggests that better air quality will bring about climate co-benefits in reducing electricity generation via lower household demand, and thus mitigating carbon emissions. This is important for policymakers when forecasting and influencing future emissions paths in the context of climate change.
Since the 1980s, air pollution has increased worldwide, but it has increased at a much faster pace in regions close to the equator. They found that the increase in ozone burden due to the spatial distribution change slightly exceeds the combined influences of the increased emission magnitude and global methane.
de novo rather than as direct emissions—via nucleation and growth is a major source of aerosol pollution in terms of number concentration. In spite of a great deal of research, it is still a puzzle why and how such new particule formation (NPF) occurs in a highly polluted urban atmosphere. —Yao et al.
SensorComm Technologies received an award through the CASCADE Innovation Program, managed by Coachella Valley Economic Partnership (“CVEP”), to conduct an Internet of Things-based (IoT) emissions monitoring pilot program within the Coachella Valley in Southern California. Global rollout is underway.
A study by a team from The Ohio State University and Ford is providing insight into the deactivation mechanism of rhodium in three-way catalysts (TWC) for automotive emissions control. This solution, however, is chemically inactive, meaning that it can’t scrub away harmful pollutants and gases, making the device effectively useless.
Regulated emissions for all test fuels over the cold-start and hot-start LA92 cycles. The emissions of CO 2 for the high-aromatics E10 were higher than the Tier 3 E10, E30, and E78 blends. Their paper is published in the ACS journal Energy & Fuels. The study found that higher ethanol blends—i.e., —Yang et al. 8b02206.
Countries seeking to meet Paris Agreement targets on CO 2 emissions must get a grip on the amount of pollution produced at city level, according to a new open-access study published in S cience Advances by an international team of researchers from Europe and China. Total CO 2 emissions of 182 Chinese cities. Shan et al.
Our findings provide unprecedented insights of the long-term net impacts of aerosols on clouds and precipitation. In polluted air, more and smaller drops are formed. The rain that is withheld in moist, polluted, deep clouds freezes at higher altitudes to form ice crystals or even hail. —Li et al. —Prof.
Contributions of regions to total life cycle emissions for three fuels (µg per vehicle-mile traveled per km 2 land area). Dashed lines show US average emissions. Associated tailpipe emissions alone account for 40?60% Credit: ACS, Tessum et al. Click to enlarge.
When airborne particles (green) form before PAHs adhere, both the pollutants and particles dissipate quickly, as shown in the top row. But when the particles form in the presence of pollutants, which is what likely happens in nature, the longer-lasting particles enable the long-range transport of the pollutants (bottom).
Previous studies revealed widespread environmental pollution and human exposure to a class of compounds called low-molecular weight synthetic phenolic antioxidants. All 24 compounds were detected in the dust: 22 for the first time, and some at relatively high levels compared with other e-waste pollutants. 1c00866.
Research led by Sandia National Laboratories has resulted in new insights about how to understand and ultimately to control the chemistry of ignition behavior and pollutant formation. These detailed mechanisms then provide the basis for understanding the formation of pollutants and predicting behavior for combustion applications.
The “second peak” for Lake Oberaar supports the hypothesis of pollutant release from melting. Melting glaciers in the Alps may cause severe environmental damage due to the release of pollutants which have been frozen in ice for decades, according to research by Swiss scientists. Credit: ACS, Bogdal et al. Click to enlarge.
Based on their findings in a new study, researchers from the University of Washington and the University of Minnesota suggest that modifying urban form—as a means of affecting motor vehicle usage—may be a strategy to mitigate urban air pollution. Their paper appears in the ACS journal Environmental Science & Technology.
EarthSense Systems—a joint venture between the University of Leicester and aerial mapping company BlueSky—has published MappAir, the first high resolution nationwide map of air pollution. ultrafine pollution particles smaller than 2.5 Air pollution is not a constant threat. micrometers) later in 2017.
The results of a new, comprehensive modeling study characterizing light-duty electric drive vehicle (EDV) deployment in the US over 108 discrete scenarios do not demonstrate a clear and consistent trend toward lower system-wide emissions of CO 2 , SO 2 , and NO x as EDV deployment increases. —Babaee et al.
Ricardo demonstrated its new real-world driving emissions measurement service ( earlier post ), and discussed the first results from its road side vehicle monitoring research, at the Air Quality & Emissions Show (AQE) in the UK earlier this week. Ricardo launched its vehicle emission measurement service in April 2017.
The benefits with battery electrification are significant, including eliminating emissions in operations, reducing noise pollution, and lowering costs by lessening the need for ventilation and cooling when required; this is especially important as underground mines keep getting deeper.
Average measured mixed fleet, HDDV, and reconstructed LDGV fuel-based BC emission factors (mixed fleet, left; HDDV, center; reconstructed LDGV, right,) compared with recent literature (reported means values), and the MOBILE 6.2C derived emission factors. Credit: ACS, Liggio et al. Click to enlarge.
An aerial methane survey conducted by the California Air Resources Board (CARB), California Energy Commission (CEC) and NASA has found that just 10% of the point sources were responsible for 60% of the total methane emissions detected. Those 30, however, were responsible for 40% of the total point source emissions detected during the survey.
The pollution project, named DeepAir (Deep Learning and Satellite Imaginary to Estimate Air Quality Impact at Scale), is led by Berkeley Lab researcher Marta Gonzalez, who is also a professor in UC Berkeley’s City & Regional Planning Department. We bring novel data sources such as mobile phones, integrated with satellite images.
By the end of 2021, the Virginia-based fleets will utilize the zero tailpipe emission trucks to transport inbound parts and components daily to the Volvo Trucks New River Valley Assembly Operations (NRV) in Dublin, Virginia, where every Volvo truck in North America is assembled.
Second, they found that while much of the air pollution policies have focused to date on the electricity sector, damages from farms are now larger than those from utilities. Indeed, farms have become the largest contributor to air pollution damages from PM2.5 related emissions.
The research is the first epidemiological study to provide evidence that ozone might advance subclinical arterial disease—injuries that occur to the artery walls prior to a heart attack or stroke—and provides insight into the relationship between ozone exposure and cardiovascular disease risk. —Meng Wang. —Meng Wang.
In-use testing of three light duty diesel vehicles—certified to US-EPA Tier2-Bin5 and California LEV-II ULEV emissions limits— found a wide variation in real world emissions performance relative to the regulatory limits. diesels and one 3.0L diesel) over pre-defined test routes exhibiting diverse driving conditions.
The locomotive will show the potential of hydrogen fuel-cell technology to reduce transportation air pollutant and greenhouse gas (GHG) emissions. The funds will be used to retire a Tier 0 diesel locomotive and to replace it with a zero-emission switching locomotive using advanced hydrogen technology.
Car buyers shouldn’t be forced to buy high-end bells and whistles when fuel economy and reducing emissions are their top priority. Both emit 31% less greenhouse gas emissions than their base conventional models due to their use of hybrid drivetrains, each of which costs approximately $4,000. The Prius scored a 9.8
The portion of GHG emissions associated with gasoline ICE vehicles is distinguished from those associated with HFCV. GHG, criteria pollutants, energy intensity, water resources, costs, urban air quality) for future year scenarios proposed for fuels and power plants associated with both mobile and stationary sources. Click to enlarge.
from an environmental viewpoint, because 1 L of diesel fuel contains more carbon than 1 L of gasoline and because diesel-powered cars emit more pollutants such as nitrogen oxides (NO x ) and particulates [but less carbon monoxide (CO) and non-methane volatile organic compounds (NMVOCs)], diesel fuel should be more taxed than gasoline.
The US Environmental Protection Agency (EPA) announced $5,959,842 million in research funding to nine institutions to improve air quality models used to simulate ozone, particulate matter (PM), regional haze, air toxics, and emerging pollutants. It will also inform the development of strategies for improving air quality.
In particular, the study led by Drew Shindell found that methane emissions have a larger warming impact due to those interactions than accounted for in current carbon-trading schemes or in the Kyoto Protocol. Shindell et al. Similar reactions influence the creation of nitrate aerosols.
Ozone pollution near Earth’s surface is one of the main ingredients of summertime smog. These observations may also assist air quality managers in assessing the most effective approaches to emission reduction programs that will improve air quality.
In some parts of Asia, Africa and South America, the researchers identified data gaps which prevented them from characterizing ozone pollution exposure patterns. However, overall, Southern Hemisphere sites tend to have lower ozone pollution levels, and fewer days above 70 ppb. Source: University of Leicester. Click to enlarge.
The zero-emission commitment from the school significantly lowers operating and fuel costs for the district to 50% of what it paid previously when charging its electric buses, as well as reducing the exposure of students and the local community to diesel particulate pollution.
results indicate that traffic is the dominating source of BC and particulate air pollution in the metropolitan area of La Paz/El Alto. Soot particles from combustion processes significantly contribute to air pollution because they contain heavy metals and polycyclic aromatic hydrocarbons which are toxic.
A study led by researchers at UC Berkeley has found that diesel exhaust forms about seven times more secondary organic aerosols (SOA) than gasoline exhaust for the same mass of unburned fuel emissions and, given emission factors, can be expected to form 15 times more SOA than gasoline per liter of fuel burned.
Benz Vans, the Österreichische Post and MANN+HUMMEL have launched a pilot project to reduce fine dust pollution and to gain comprehensive insights into effectiveness, weather influences and durability in real-life operation. The pilot project is intended to show how these successes can be further optimized.
The proposed Keystone XL pipeline for transporting oilsands-derived crude to Gulf Coast refineries would have “ no material impact ” on US greenhouse gas (GHG) emissions, according to a new Insight report by IHS CERA. —IHS Cera Insight on Keystone XL. —IHS CERA Insight. —IHS CERA Insight.
Consequently, vehicle emissions have become an increasingly conspicuous contributor to air pollution in Chinese urban areas. Fourteen percent buses used gasoline, were equipped with carburetors, and had no any end-of-pipe emission control devices. Light-duty gasoline vehicles were the major contributors to CO and VOC emissions.
Two Colorado State University (CSU) researchers have received a $325,000 National Science Foundation grant to determine the pollutant formation chemistry of algae-derived biofuels, which have potential to be high-yield, efficiently produced, renewable fuels. Are there going to be any consequences that we may not have thought about?
We also need to ensure people know about the financial benefits—the BIK scheme and emissions based parking are just the start. With this knowledge and mounting incentives, motorists will be able to make informed decisions about their next car or how they take their next journey. —Peter O’Driscoll, Managing Director at RingGo.
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