UB study finds link between ambient ozone exposure, artery wall thickness

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Long-term exposure to ambient ozone appears to accelerate arterial conditions that progress into cardiovascular disease and stroke, according to a new University at Buffalo study. 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.

2019 93

Study: ozone levels higher across China than in other countries tracking the air pollutant

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In China, people breathe ozone-laden air two to six times more often than people in the United States, Europe, Japan, or South Korea, according to a new international study published in Environmental Science & Technology Letters. By one metric—total number of days with daily maximum average ozone values (8-hour average) greater than 70 ppb—China had twice as many high ozone days as Japan and South Korea, three times more than the United States, and six times more than Europe.

2018 72

Study links ambient PM2.5 and ozone specifically caused by vehicle exhaust emissions to ~361,000 premature deaths worldwide in 2010 and ~385,000 in 2015

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and ozone deaths, associated mortality rates, and population in G20 economies in 2015. and ozone worldwide in 2010 and ~385,000 in 2015, equivalent to 11.7% and ozone premature deaths in 2010 and 11.4% and ozone concentrations from transportation emissions resulted in 7.8 The urban areas with the highest number of transportation-attributable air pollution in 2015 were Guangzhou, Tokyo, Shanghai, Mexico City, Cairo, New Delhi, Moscow, Beijing, London, and Los Angeles.

2019 79

Researchers fully characterize reaction that affects ground-level ozone formation; a small but significant impact on predictive models

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The two combine in the atmosphere to make either nitric acid or peroxynitrous acid; the so-called branching ratio of these two chemicals is important in models of ozone production. However, any increase in expected ozone levels will be important to regulators.

2010 96

Urban CO2 Domes May Enhance May Increase Ozone and PM, With Accompanying Increase in Mortality

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In a new study published online 10 March in the ACS journal Environmental Science and Technology , however, Stanford University professor Mark Jacobson finds that local CO 2 emissions in isolation may increase local ozone and particulate matter. In other words, the proposal prices a ton of CO 2 emitted in the middle of the sparsely populated Great Plains, for example, the same as a ton emitted in Los Angeles, where the population is dense and the air quality already poor.

Ozone 76

Study Concludes that Rocket Launches May Need Regulation to Prevent Ozone Depletion

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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. If left unregulated, rocket launches by the year 2050 could result in more ozone destruction than was ever realized by CFCs.” Solid rocket motors (SRMs) and liquid rocket engines (LREs) deplete the global ozone layer in various capacities.

Ozone 60

Pollution plumes in Paris air are richer in gaseous aromatic compounds than in LA; gasoline engines main source of VOCs

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The study also shows that the proportion of gaseous aromatic compounds—apart from benzene—in hydrocarbon emissions is two to three times greater in pollution plumes in Paris than in Los Angeles, even though the total quantity of hydrocarbons emitted in Los Angeles remains considerably greater than in Paris. times greater than in Los Angeles due to the greater overall volatile hydrocarbon pollution in the latter city.

Study estimates ~4M children worldwide develop asthma each year because of NO2 air pollution

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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.

2019 150

NOAA, partners find about 98% decline in VOCs concentrations in LA Basin over last 50 years despite 3x increase in use of gasoline and diesel

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In California’s Los Angeles Basin, levels of volatile organic compounds (VOCs) pollutants have decreased by about 98% since the 1960s, even as area residents now burn approximately three times as much gasoline and diesel fuel. VOCs, primarily emitted from the tailpipes of vehicles, are a key ingredient in the formation of ground-level ozone which, at high levels, can harm people’s lungs and damage crops and other plants.

2012 93

California workshop on hydrogen and fuel cells in ports

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This workshop is the follow-up to the Hydrogen and Fuel Cells in the Ports Workshop 2016, held in Port of Los Angeles. In California, the environmental footprint of ports is significant, both because of the volume of activity itself and because they tend to be located in areas that already experience heavy automobile and truck traffic, create smog, particulate matter, and ozone pollution.

2017 60

Annual American Lung Association report shows continued progress in air quality, but more to be done

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This year’s report finds that the majority of American cities most-polluted by ozone (smog) or year-round particle pollution (soot) have improved, showing continued progress in the cleanup of toxics under the requirements of the Clean Air Act. million people—live in areas with levels of ozone and/or particle pollution that are often dangerous to breathe. Counties are graded for ozone, year-round particle pollution and short-term particle pollution levels.

Ozone 76

CARB approves $423M plan to mitigate harm from Volkswagen defeat devices; significant investments in heavy-duty vehicles and equipment sectors

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Excess NO x emissions are a major public health concern in California, because they are a key ingredient in formation of ozone (smog), CARB notes. More than 10 million Californians live in areas in extreme non-compliance areas for ozone.

2018 118

Study first to quantify amount of US pollution resulting from Chinese manufacturing for exports

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Dust, ozone and carbon can accumulate in valleys and basins in California and other Western states. Average annual percentage of black carbon pollution related to Chinese exports. Credit: Lin et al. Click to enlarge.

2014 134

USC study finds particulate matter in air pollution affects thyroid development in fetuses

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USC is situated in the Los Angeles region, home to historically severe urban smog, an ideal laboratory to study air pollution health effects and environmental change across time. They did not see the same increases associated with other air pollutants, such as ozone or nitrogen dioxide.

2018 98

Decrease in air pollution associated with decrease in respiratory symptoms among children

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of the University of Southern California, Los Angeles, and colleagues examined whether improvements in ambient air quality in Southern California were associated with reductions in bronchitic symptoms in children. The authors found that decreases in ambient concentrations of nitrogen dioxide, ozone, and particulate matter with an aerodynamic diameter less than 10 µm (PM 10 ) and less than 2.5

2016 65

MIT study says combustion emissions cause ~200,000 premature deaths/year in US; vehicles and power generation top sources

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1,000 to 21,000) deaths due to changes in ozone concentrations. 900 to 11,000) ozone-related early deaths per year. 300 to 4,000) ozone-related premature mortalities per year. 2000 (90% CI: 0–4,000) early deaths from ozone, according to the study. Pollution from industrial activities was highest in the Midwest, roughly between Chicago and Detroit, as well as around Philadelphia, Atlanta and Los Angeles.

2013 120

Berkeley study identifies diesel as main source of vehicular secondary organic aerosols

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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. Similar to Los Angeles, OA concentrations and ?OA/?CO

2012 120

Study warns on possible air pollution link to neuroinflammatory, Alzheimer and Parkinson’s pathologies in megacity children

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While the study focused on children living in Mexico City, others living in cities where there are alarming levels of air pollution such as Los Angeles, Philadelphia-Wilmington, New York City, Salt Lake City, Chicago, Tokyo, Mumbai, New Delhi or Shanghai, among others, also face major health risks. In the US, 200 million people live in areas where pollutants such as ozone and fine particulate matter exceed the standards.

2014 91

Study: more stringent O3 and PM2.5 air pollution standards could save thousands of lives, greatly improve public health

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In addition to ozone and particulate matter, the other pollutants are lead, carbon monoxide, nitrogen dioxide and sulfur dioxide. standards are: Los Angeles (Long Beach-Glendale), CA: 1,341 lives saved, 3,255 fewer morbidities and 2,892,029 fewer impacted days.

2016 78

California to award $23.6M for zero-emission drayage trucks at seaports; BYD, Kenworth, Peterbilt, Volvo

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Freight transport in California is a major economic engine for the state but also accounts for about half of toxic diesel particulate matter (PM 2.5 ), 45% of the emissions of NO x that form ozone and fine particulate matter in the atmosphere, and 6% of all GHG emissions in California. The SCAQMD is the air pollution control agency for Orange County and major portions of Los Angeles, San Bernardino and Riverside counties. The State of California is awarding $23.6

California Energy Commission adopts $100M investment plan for 2013-2014 for green vehicles and fuels

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The program is an important component of California’s efforts to reduce greenhouse gas emissions to 80% below 1990 levels by 2050, as required by AB 32; decrease petroleum fuel use to 15% below 2003 levels by 2020; increase the use of alternative fuels to 26% of all fuel consumed by 2022; and reduce emissions of nitrogen oxides to 80% of 2010 levels by 2023 to help meet federal ozone standards in areas of California such as the San Joaquin Valley and South Coast air basins.

2013 97

Field study finds soot particles absorb significantly less sunlight than predicted by models; climate models may be overestimating warming by BC

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Black carbon is part of a group of pollution sources known as Short-Lived Climate Forcers (SLCFs), including methane gas and ozone, which are produced on earth.

2012 114

EPA and DOT issue final Phase 2 GHG and fuel efficiency rulemaking for medium- and heavy-duty trucks

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In order to achieve the 2008 Ozone National Ambient Air Quality Standards set by US EPA, CARB estimates that the South Coast Air Basin alone (including Los Angeles) will need an 80% reduction in NO x emissions by 2031. The US Environmental Protection Agency (EPA) and the US Department of Transportation’s National Highway Traffic Safety Administration (NHTSA) jointly released the finalized Phase 2 greenhouse gas and fuel efficiency standards for medium- and heavy-duty trucks.

2016 60

Study finds paved surfaces in Houston worsen air quality

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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. Paved surfaces in the Houston area keep the city warmer than more natural surfaces.

Stanford Professor Urges EPA to Include Black Carbon in Endangerment Finding

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F, with about 40% due to ozone. The second study found that local CO 2 emissions produce CO 2 domes over cities, which increase local ozone and PM, increasing local mortality. The study found that CO 2 domes increase air pollution deaths by 50-100 per year in California, with most occurring in Los Angeles.

2009 60

California ARB Seeks Further Reductions of Diesel Emissions at State Rail Yards

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BNSF has been operating four liquefied natural gas yard locomotives in downtown Los Angeles since the mid-1990s. NO x helps create ground-level ozone, or smog. Additional diesel PM reductions in 18 major CA railyards with five new locomotive measures. Source: Staff presentation.

2009 83