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Ozone levels across much of North America and Europe dropped significantly between 2000 and 2014. People living in parts of southern Europe, South Korea and southern Japan and China also experienced more than 15 days a year of ozone levels above 70 ppb. Trends in daily maximum ozone levels (known as 4MDA8) at urban and non-urban sites.
Mineta San José International Airport’s (SJC) has deployed a fleet of 10 Proterra battery-electric buses that will transport passengers and their luggage between SJC’s parking lots, rental car center, and terminals. The electric bus fleet is anticipated to reduce ozone emissions by 1.1 SJC has been one of America’s fastest?growing
A study by an international team led by scientists at the University of East Anglia have identified four new man-made gases in the atmosphere, all of which are contributing to the destruction of the ozone layer. CFCs are the main cause of the hole in the ozone layer over Antarctica. Brenninkmeijer, Paul J. Oram, Claire E.
Ozone, the main component of smog, is a plant-damaging pollutant formed by emissions from vehicles, cooking stoves and other sources. New research shows that ozone pollution damaged millions of tons of wheat, rice, soybean and cotton crops in India in 2005. Surface ozone pollution in India damaged 6 million metric tons (6.7
(Japan) report in the journal Angewandte Chemie the development of a mesoporous two-line ferrihydrite (2LFh)—ferrihydrite is a widespread mineral composed of iron, oxygen, and water—that could lead to a new generation of ozone filters in electrostatic devices and aircraft applications. removal; it showed about 95 % O 3.
The California Air Resources Board today approved a statewide plan for attaining the federal health-based standard for ozone, typically experienced as smog. The 2022 State Implementation Plan Strategy identifies the state’s control strategy for meeting the federal 70 parts per billion, 8-hour ozone standard over the next 15 years.
Springtime ozone distributions for 1984, 1995–2008 in the mid-troposphere (3.0–8.0 Springtime ozone levels above western North America are rising primarily due to air flowing eastward from the Pacific Ocean, a trend that is largest when the air originates in Asia. The US EPA recently proposed new tougher ground-level ozone standards.
Black carbon and tropospheric ozone are harmful air pollutants that also contribute to climate change. Reducing black carbon and tropospheric ozone now will slow the rate of climate change within the first half of this century, the study said.
Dust, ozone and carbon can accumulate in valleys and basins in California and other Western states. Los Angeles experiences at least one extra day a year of smog that exceeds federal ozone limits because of nitrogen oxides and carbon monoxide emitted by Chinese factories making goods for export, the analysis found. Click to enlarge.
The modeled 2028 base year 8-hour ozone design values were found to be above the 70 ppb NAAQS for 75 monitoring locations. By 2035, 46 states will be in attainment with the 2015 ozone NAAQS of 70 ppb (only counties in California and Utah remain in nonattainment). Source: MECA. ppb in the west (San Bernardino, CA) and 4.9
There are widespread policy assumptions that the phase-out of gasoline and diesel internal combustion engines will over time lead to much reduced emissions of Volatile Organic Compounds (VOCs) from road transport and related fuels. Cliff et al. While some VOCs are released in exhaust, others may arise from an unexpected source—e.g.,
Researchers from Northwestern University and Princeton University have explored the impact on US air quality from an aggressive conversion of internal combustion vehicles to battery-powered electric vehicles (EVs). Across scenarios, we found the more cars that transitioned to electric power, the better for summertime ozone levels.
The US Environmental Protection Agency (EPA), USDepartment of Justice (DOJ), and California Air Resources Board (CARB) announced a proposed settlement with Daimler AG and its American subsidiary Mercedes-Benz USA, LLC resolving alleged violations of the Clean Air Act and California law associated with emissions cheating.
The EPA has dismissed two panels of outside scientists that advised the agency on particulate matter and ground-level ozone, which have been linked to smog and respiratory problems.
The issuance of an endangerment finding enables the regulation of greenhouse gases under the Clean Air Act. Combined with the endangerment finding, this enables the regulation of greenhouse gas emissions from motor vehicles under the Clean Air Act. In both magnitude and probability, climate change is an enormous problem.
HFCs are powerful greenhouse gases originally developed as substitutes for ozone-depleting chemicals. A binding legal agreement exists that can cut HFCs now—the Montreal Protocol ozone treaty—and many alternatives to HFCs have already been developed and are waiting for the right regulatory incentive from the Montreal Protocol to be deployed.
has agreed to spend more than $161 million on pollution controls, enhanced maintenance and monitoring, and improved internal management practices to resolve Clean Air Act violations at its Texas City, Texas refinery. BP Products North America Inc. The company will also pay a $12 million civil penalty.
Currently, the Clean Air Act limits the volatility of gasoline to 9.0 psi RVP in southern ozone non-attainment areas—but allows a 1 psi RVP waiver for E10. Thus, the evaporative emission increase caused by E30 would then be less than for E10. psi RVP and 7.8 This waiver applies only to E10 (E9-E10), not more, not less.).
And hydroxyls drive long chains of reactions involving other common gases, including ozone. That’s noteworthy because nitrogen oxides have primarily been associated with ozone formation and warming in the past. Andreae (2009) Perspectives: Clean the air, heat the planet? Drew Shindell. Arneth, A., Kulmala, and M.O.
Despite reports that global emissions of the potent greenhouse gas, HFC-23, were almost eliminated in 2017, an international team of scientists, led by the University of Bristol, has found atmospheric levels growing at record values. This is not the first time that HFC-23 reduction measures attracted controversy.
EPA will finalize its mobile source GHG rules under the Clean Air Act, and “ provide a framework for continued improvements in that sector.” ( Earlier post. ). Cleaning Up Communities. Jackson wrote that EPA will also focus on improving EPA’s internal operations, from performance measures to agency processes.
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. Vehicle Integration.
The data showed a 50% jump in efficiency each time the panels were cleaned after being left alone for several weeks. The manmade particles are also small and sticky, making them much more difficult to clean off. If cleanings take place every two months, those numbers jump to 25 or 35%. —Michael Bergin. 7b00197.
Traditional ignition systems when used to enhance internal combustion engine (ICE) efficiency and lower emissions are handicapped with high energy consumption and poor durability leading to an unattractive cost of ownership. These vehicles have long lifetimes and will continue to occupy the roads next to clean EVs for years to come.
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.
NO x emissions have not been decreasing as expected in recent years (2011–2015) when comparing top-down estimates from satellites and surface NO 2 measurements to the trends predicted from the US Environmental Protection Agency’s emission inventory data, according to a new study by an international team of researchers.
The bill also modifies the Clean Air Act to require the development of greenhouse gas emissions standards for all other mobile sources—e.g., A transitioning title intended to protect US consumers and industry and promotes green jobs during the transition to a clean energy economy. Clean Fuels and Vehicles.
A new international study suggests that springtime ozone levels above western North America are rising mainly because of air flowing eastward from the Pacific Ocean – a trend at its largest when the air originates in Asia. This could even make it difficult for the US to meet Clean Air Act standards for ozone pollution.
The international study could have implications for the air quality of fast-growing coastal cities in the United States and other mid-latitude regions overseas—the proliferation of strip malls, subdivisions, and other paved areas may interfere with breezes needed to clear away smog and other pollution.
These were shown to be ozone-depleting, however, and were targeted for phasing out under the 1987 Montreal Protocol. However, HFC-134a, while having zero ozone-depletion potential, has a very high global warming potential—more than 1,500 times as much warming as an equivalent amount of CO 2.
are based on scores of national and international epidemiological, animal and human exposure studies. The EPA sets standards for six principal air pollutants to meet its obligation under the Clean Air Act to protect the health of the American public, including vulnerable populations, by an adequate margin of safety.
Thanks to the Infrastructure Investment and Jobs Act’s (IIJA), there is $5 billion available in funding for clean school buses. Empowering clean transportation for children We’ll start with the most important reason; electric school buses are healthier for the children. Ready to get started?
The International Maritime Organization’s ( IMO ) regulations on pollution from ships are found within the International Convention on the Prevention of Pollution from Ships ( MARPOL 73/78 ). MARPOL Annex VI sets limits on NO x and SO x emissions from ship exhaust, and prohibits deliberate emissions of ozone-depleting substances.
The allocation system is designed to reward those who have taken early action and have invested in energy efficiency and GHG emissions reductions and will encourage continued investment in efficiency and clean energy in the future. Cost Containment Mechanisms. Offset Protocols. Compliance and Enforcement.
The Colorado Air Quality Control Commission adopted the Colorado Clean Cars standard on Friday, directing manufacturers to make 82 percent of all light-duty vehicles sold electric by 2032, as detailed in a press release. They also do not apply to used vehicles or those used for things like construction or agriculture.
Key Steps to Cleaning Southern California’s Air Diesel Class 8 trucks run seemingly tail-to-nose from the Ports of Long Beach and Los Angeles to the Inland Empire in Southern California. As Jimmy Hoffa, the late president of the International Brotherhood of Teamsters said, “If you got it, a truck brought it to you.”
Wanser: We start from the point of view of public safety, which is a concept in international environmental law and environmental law in the United States. And it would be interesting for us to think about whether there's a clean variation that we might want to replace it with. What do we have to offer these billion people?
The ACES results are expected to play an important role in future risk reviews of diesel engines by international and US agencies. —Bob O’Keefe, Vice President of HEI and Chair of Clean Air Asia.
In 2004, the Centralina region (the Greater Charlotte metro area, which straddles the North CarolinaSouth Carolina border) was designated as a non-attainment area for ozone under the Clean Air Act. For many years, you were the convener of the International Hydrail Conferences (IHCs).
Take, for example, the tens of thousands of fossil-fueled ships that chug across the ocean, spewing plumes of pollutants that contribute to acid rain, ozone depletion, respiratory ailments, and global warming. Coauthor Gary Cooper and intern Jessica Medrado test the effervescent nozzle inside the tent. Kate Murphy. Kate Murphy.
The analysis also looked at the impact of climate change on human health and suggests that it may lead to higher levels of ground-level ozone, a harmful pollutant. Before taking steps to reduce greenhouse gases under the Clean Air Act, the EPA must conduct an appropriate process with stakeholder input.
Vehicle fleets across the United States are transitioning from internal combustion engine (ICE) to electric vehicles, and that includes school bus fleets. This number includes buses that have been awarded, ordered, delivered, or are already in operation.
like people driving futuristic electric cars and everything being clean! Reply Neutral Elodie @ Apr 19th 2009 4:38PM How clean is an electrical car, really? Still totally cool to see automakers can agree about stuff (much better than computer makers, indeed), but I always find it weird when people say electrical cars are clean.
Fast action on pollutants such as black carbon, ground-level ozone and methane may help limit near term global temperature rise and significantly increase the chances of keeping temperature rise below 2 °C (3.6 °F)—and Introduction of clean-burning biomass stoves for cooking and heating in developing countries.
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