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Drought conditions can have complicated effects on ozone air quality, so to better understand the process, researchers have analyzed data from two ozone-polluted cities before, during and after the California drought. However, plants also decrease air ozone levels by taking the gas up through pores in their leaves.
Hyundai Motor has secured $3.5 The XCIENT Fuel Cell 6x4 tractor model participating in the demonstration is equipped with a 180 kW fuel cell system and e-motor with a maximum output of 350 kW. Hyundai Motor will begin operating 30 Class 8 XCIENT Fuel Cell electric trucks in California starting in the second quarter of 2023.
Toyota Motor Corporation (TMC) and Toyota Central R&D Labs., have developed a simulator able to predict tropospheric ozone concentrations across the whole of South and East Asia. Tropospheric ozone is the main cause of photochemical smog, an atmospheric pollutant harmful to human health and plant growth.
US EPA Region 9 8-hour ozone trends, 1979-2000. These State Implementation Plans (SIPs) are the roadmaps to meeting the 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS) of 0.08 In 1997, EPA first established the 8-hour ozone standard, which replaced the older 1-hour ozone standard (0.12 Source: EPA.
The US Environmental Protection Agency announced that it is proposing to find that the San Joaquin Valley, and California’s South Coast and the Southeast Desert have failed to meet the 1-hour ozone standard by their required deadlines. Children and the elderly are most impacted by ozone pollution. NO x and VOCs are ozone precursors.
Exposure to ozone at levels currently deemed safe by the NAAQS clean air standards can have a significant and negative effect on lung function, according to researchers at the University of California, Davis. The previous primary and secondary standards were identical 8-hour standards, set at 0.08 Earlier post.).
The proposed multi-pollutant rule would further reduce air pollution from heavy-duty engines and vehicles across the United States, including ozone and particulate matter (PM). In 2045, the proposed Option 1 would result in total annual monetized ozone- and PM 2.5
General Motors expects its Spring Hill Manufacturing plant will be powered by 100% solar energy beginning in late 2022. A green tariff agreement with the Tennessee Valley Authority is expected to supply up to 100 megawatts of solar energy per year, or the amount of electricity consumed by 18,000 United States households annually.
The global market for rocket launches may require more stringent regulation in order to prevent significant damage to Earth’s stratospheric ozone layer in the decades to come, according to a new study by researchers in California and Colorado. Darin Toohey.
The purpose of the federal RFG program is to improve air quality in certain areas through the use of gasoline that is reformulated to reduce motor vehicle emissions that lead to the formation of ground-level ozone. States which are designated by EPA as part of the Ozone Transport Region, such as Maine, can “opt-in” to the program.
VOCs and nitrogen oxides react with sunlight to form ground-level ozone, the main component of smog. The team also observed chemical transformations of the emissions from Decatur, including formation of new particles, nitric acid, peroxyacyl nitrates, aldehydes, ozone and sulfate aerosol.
The US Environmental Protection Agency (EPA) has issued final approval for HFO-1234yf refrigerant ( earlier post ) in motor vehicle air conditioning systems. The chemical, which does not deplete the ozone layer, may now be used in air conditioning for new cars and light trucks. Using HFO-1234yf is one option available to automakers.
The proposed cause or contribute finding concludes that that the combined emissions of CO 2 , CH 4 , N 2 O, and HFCs from new motor vehicles and motor vehicle engines contribute to the atmospheric concentrations of these key greenhouse gases and hence to the threat of climate change.
22 kWh pack, 70 kW motor). Photochemical Ozone Creation Potential (kg Ethene equivalent). Quantifies the production of pollutant ozone (? to ozone layer), the results of the reaction of sunlight on NO x and volatile organic compounds. The Fluence is a 4-door, 5-seat sedan. Renault assessed the diesel Fluence dCi (1.5L
Through a series of innovative experiments he demonstrated that most of California’s smog is the result of motor vehicle exhaust and industrial smokestack pollution reacting with sunlight to create ground-level ozone.
On urban scales, annual estimates of asphalt-related SOA precursor emissions exceed those from motor vehicles and substantially increase existing estimates from noncombustion sources. Decades of research about and regulations of emissions from motor vehicles and other combustion-related sources have resulted in improved urban air quality.
Deterioration of the ozone layer [kg CFC-11-eq.]. The tool also assesses the environmental impacts of the entire life cycle of passenger cars, including the manufacture of the body and all other components, such as batteries for electric motors. Depletion of fossil energy resources [kg oil-eq.].
Tata Motors Limited and MAHLE have signed a joint development agreement for designing and developing a Secondary Loop Mobile Air Conditioning System (SL-MAC), under the aegis of United Nations Environment. The new SL-MAC system, which is testing the low-GWP refrigerants, is expected to increase vehicle energy efficiency.
Applicants will be expected to collect data under real world cargo transport conditions in the prime applicant’s 8-hour ozone non-attainment area. systems in roadbeds or rail lines that propel trucks or trains. This funding opportunity is open to local governments and private companies, with federal funds matched in a 50% cost share.
systems in areas classified “Serious,” “Severe,” or “Extreme” for nonattainment of the ozone national ambient air quality standard (NAAQS). Vapor emissions from refueling, if allowed to escape, can contribute significantly to ground-level ozone, sometimes called smog, as well as to other types of harmful air pollution.
In California, motor vehicles are the main source of smog-forming pollution and diesel exhaust accounts for 70% of Californians’ daily exposure to air toxics. When the cetane number is too low, unburned hydrocarbons, which lead to smog, tend to increase.).
Compared to the 2010 “Business as Usual” scenario—which includes all adopted emission control measures for the South Coast—NO x levels must be reduced by 65% and by 75% to meet the 2023 and 2032 ozone standards, respectively. An 80% reduction of GHG emissions is targeted for 2050, relative to 1990 levels. Policy implications.
However, emissions from the use and wear of brakes, tires, and other non-tailpipe sources are gaining interest from researchers and regulators because non-tailpipe sources now contribute a higher fraction of the particulate emissions from motor vehicles.
lower ozone formation potential of the carbonyl compounds present than DF under the identical operating conditions. Kleeman (2008) “Carbonyl Emissions from Gasoline and Diesel Motor Vehicles,”. In addition, there was an 18.0–35.8% reduction in total carbonyls and a 3.4–100% CFT had 16.5–44.1% —Hao et al. 2014.05.025.
The staff of the California Air Resources Board (CARB) is proposing amendments to the Fill Pipes Specifications to help ensure new motor vehicle fill pipes continue to be compatible and to form a good seal with Phase II recovery nozzles that are certified for use at California gasoline stations, thereby reducing overpressure.
used a climate model to analyze the effects of a wide range of chemical species, including carbon dioxide, nitrous oxide, methane, organic carbon, black carbon, nitrate, sulfate, and ozone, from 13 sectors of the economy from 2000 to 2100. Unger et al.
The company will also extend the warranty period for certain parts in the repaired vehicles, perform projects to mitigate excess ozone-creating nitrogen oxides (NO x ) emitted from the vehicles, and implement new internal audit procedures designed to prevent future emissions cheating. million in other penalties.
A research team from Ford Motor Company and the University of Copenhagen has performed a systematic study of the vapor pressures of single and dual-blends of different alcohols with potential to be used as biofuels, including methanol; ethanol; 1- and 2-propanol; and 1-, 2-, i -, and t -butanol. Credit: ACS, Andersen et al.
The announcement follows press reports from the Geneva Motor Show that Daimler, BMW and Volkswagen would pursue CO 2 (R744) as the refrigerant for MACs instead of R-1234yf (developed by Honeywell and DuPont). R134a replaced CFC-12 as the MAC refrigerant in the early 1990s due to the negative impact of CFCs on the Earth’s ozone layer.
NO 2 is just one component of air pollution, which is made up of many pollutants (including particulate matter, ozone, carbon monoxide), which are known to have numerous adverse effects on health. NO 2 is a pollutant formed mainly from fossil fuel combustion, and traffic emissions can contribute up to 80% of ambient NO 2 in cities.
Among the findings of the report, “HFC-134a phase-out in the Chinese light-duty motor vehicle sector”, was that, considering the social cost of CO 2 e, up to 1 trillion RMB in costs (US$150 billion) required to address climate change could be avoided through 2050 by transitioning to low-GWP alternative MACs. Background.
Specifically, the proposed rule updates the current prohibition under section 608 of the Clean Air Act against knowingly venting, releasing or disposing of ozone-depleting (ODS) and substitute refrigerants and extends the requirements, as appropriate, to non-ozone-depleting substitute refrigerants, such as hydrofluorocarbons (HFCs).
Typically, HEI receives half of its core funds from the US Environmental Protection Agency and half from the worldwide motor vehicle industry. Other public and private organizations periodically support special projects or certain research programs. Frank Kelly, H.
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. is attributable to motor vehicles.
The children lived in communities that differed in sources and levels of the outdoor pollutants PM, NO 2 , and ozone. Environmental Protection Agency and the worldwide motor vehicle industry. HEI typically receives balanced funding from the U.S.
A team at Ford Motor Company’s Research and Innovation Center in Dearborn conducted a detailed study of the effect of ethanol blend level in emissions, using a 2006 model Mercury Grand Marquis flexible fuel vehicle (FFV) operating on E0, E10, E20, E30, E40, E55, and E80 on a chassis dynamometer. Credit: ACS, Hubbard et al. Click to enlarge.
Houston, with a mix of petrochemical facilities, sprawling suburbs, and traffic jams that stretch for miles, has some of the highest levels of ground-level ozone and other air pollutants in the United States.
The production of air pollution from motor vehicles, industrial power plants, and fossil fuel emissions are determined by complex chemical reactions. The researchers compared current techniques used to describe atmospheric chemical reactions against more historical techniques.
Development of sustainable communities strategies can also provide an opportunity for associated criteria pollutant emission reductions that will be needed to attain air quality standards for ozone and particulate matter as well as reduce near-roadway exposures.
The use of petroleum-derived fuels is an important source of reactive gas-phase organic carbon that provides key precursors to the formation of secondary OA (SOA) and tropospheric ozone. We provide the ability to predict emissions of SOA precursors and SOA formation that is consistent with fuel use data and ambient measurements.
Freon, also known as R-12, was replaced starting in the early 1990s with R-134a, which did less damage to the ozone layer. Today, General Motors. Among the many substances emitted by autos back in the "good old days" were the refrigerant gases that would leak from older auto air conditioners.
The damages the committee was able to quantify were an estimated $120 billion in the US in 2005, a number that reflects primarily health damages from air pollution associated with electricity generation and motor vehicle transportation. Damages from motor vehicles and fuels. of the estimated total.
ozone, PM) problems may be less pressing. It is likely that the reduction in tailpipe emissions from use of B20 will occur in airsheds where air quality is a significant problem, whereas the emissions associated with the fuel cycle may occur in rural areas where air quality (e.g.,
NO x is a precursor for both ground level ozone and secondary PM 2.5 The transportation sector was responsible for over 7 million tons of NO x emissions in the US in 2014, with 50% of this sector’s NO x attributed to heavy-duty on- and off-road vehicles and equipment.
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