This site uses cookies to improve your experience. To help us insure we adhere to various privacy regulations, please select your country/region of residence. If you do not select a country, we will assume you are from the United States. Select your Cookie Settings or view our Privacy Policy and Terms of Use.
Cookie Settings
Cookies and similar technologies are used on this website for proper function of the website, for tracking performance analytics and for marketing purposes. We and some of our third-party providers may use cookie data for various purposes. Please review the cookie settings below and choose your preference.
Used for the proper function of the website
Used for monitoring website traffic and interactions
Cookie Settings
Cookies and similar technologies are used on this website for proper function of the website, for tracking performance analytics and for marketing purposes. We and some of our third-party providers may use cookie data for various purposes. Please review the cookie settings below and choose your preference.
Strictly Necessary: Used for the proper function of the website
Performance/Analytics: Used for monitoring website traffic and interactions
Less traffic on the roads during the first COVID-19 lockdown in the UK led to a reduction in air pollution but may have caused potentially damaging surface ozone levels to rise, according to a new study led by researchers at the University of York. The problem is being created by the change in chemistry between NO x and O 3.
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 study found that chronic exposure to ozone was associated with a progression of thickening of the main artery that supplies blood to the head and neck.
From 2011 to 2015, California experienced its worst drought on record, with a parching combination of high temperatures and low precipitation. Although ozone in the stratosphere protects the earth from ultraviolet radiation, at ground level the molecule is a harmful air pollutant to humans, animals and plants.
Large improvements of air quality in China during the lockdown have been widely reported, but new research shows that two pollutants harmful to human health—fine particulate matter (PM 2.5 ) and ozone—were only slightly reduced. and ozone were only slightly reduced or barely affected.
Exposure to ozone, long associated with impaired lung function, is also connected to health changes that can cause cardiovascular disease such as heart attack, high blood pressure and stroke, according to a new study of Chinese adults. The findings associated ozone exposure with markers of platelet activation and increased blood pressure.
A team from Duke University in the US and University of York in the UK have utilized a novel method to estimate long-term ozone exposure and previously reported epidemiological results to quantify the health burden from long-term ozone exposure in three major regions of the world. —Seltzer et al. —Karl Seltzer.
EPA is proposing , at the request of the State of Maine, to require the sale of reformulated gasoline ( RFG ) in York, Cumberland, Sagadahoc, Androscoggin, Kennebec, Knox and Lincoln counties in southern Maine starting in June 2015. The Maine legislature subsequently postponed the requirement for sale of RFG until 1 June 2015.
Ozone pollution near Earth’s surface is one of the main ingredients of summertime smog. It is also not directly measurable from space due to the abundance of ozone higher in the atmosphere, which obscures measurements of surface ozone. —Jin et al.
The first peer-reviewed study to directly quantify how emissions from oil and natural gas (O&NG) activities influence summertime tropospheric ozone (O 3 ) pollution in the Colorado Front Range confirms that chemical vapors from oil and gas activities are a significant contributor to the region’s chronic ozone problem.
Although halogens released from long-lived anthropogenic substances, such as chlorofluorocarbons (CFCs), are the principal cause of the recent depletion of stratospheric ozone, recent observations show that very short-lived substances (VSLS), with lifetimes generally under six months, are also an important source of stratospheric halogens.
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 2015ozone 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
and ozone at or above the current standards have been linked to neuroinflammation and high risk of Alzheimer’s disease (AD). A 2015 study found a 138% risk of increase of AD per increase of 4.34 ?g/m Exposures to concentrations of PM 2.5 g/m 3 in PM 2.5
Some of the substitutes for ozone-damaging chemicals that being phased out worldwide under international agreements are themselves potent greenhouse gases and contribute to warming. Burkholder (2015) “An atmospheric photochemical source of the persistent greenhouse gas CF4” Geophysical Research Letters doi: 10.1002/2015GL066193.
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. —Joost de Gouw. de Gouw et al.
The program will expand in 2015 to include fuel distributors to address emissions from combustion of transportation fuels and combustion of natural gas and propane at sources not covered in the first phase of the program. Offset Protocols.
Nationwide, the company plans to have more than 3,100 trucks nationwide running on natural gas and other alternative fuels by the end of 2015. According to the US Environmental Protection Agency, each new CNG solid waste and recycling truck reduces ozone-forming emissions by as much as 80% when compared to older diesel powered trucks.
These findings are significant due to the fact that NO x and ozone are major non-attainment concerns for many areas across the nation. As a nonprofit research center that works extensively on emission reduction research, CAFEE also conducted research that exposed the Volkswagen emissions violations in 2015, resulting in a $14.7
Researchers at the University of California, Irvine and other institutions have conducted a statistical analysis of pollution exposure and yields from 1980 to 2015 on a key sector making up about 38% of the state’s total agricultural output: perennial crops such as almonds, grapes, nectarines, peaches, strawberries and walnuts.
Through routine audits, CARB discovered that Del Monte’s chartered fleet calling at the Port of Hueneme for 2015-2016 did not meet the operational time limits for at least 50% of its visits and did not reduce its auxiliary engine power generation by 50%. These reductions decrease air pollution and the mortality rate of endangered whales.
In the US, 200 million people live in areas where pollutants such as ozone and fine particulate matter exceed the standards. The full article is scheduled to be published in Volume 43, Issue 3 of the Journal of Alzheimer’s Disease and will appear online in December with a 2015 copyright. Lilian Calderón-Garcidueñas et al.
The study, based on data from 2010 to 2015, estimates that 64% of these new cases of asthma occur in urban areas. 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.
Starting in 2015, India and China, thought to be the main emitters of HFC-23, announced ambitious plans to abate emissions in factories that produce the gas. However, levels have been soaring because it is vented to the atmosphere during the production of another chemical widely used in cooling systems in developing countries.
The California Air Resources Board (ARB) has adopted new LEV III emissions regulations which go into effect in 2015, requiring automakers to further reduce evaporative emissions. This patented technology is applied directly onto the surface of a vehicle’s air intake box to adsorb engine hydrocarbons without increasing backpressure.
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 study found that 60% of the winter primary hydrocarbon hydroxyl radical reactivity in London is from those diesel-related hydrocarbons; the authors predicted that the longer-chain HCs contribute up to 50 % of the ozone production potential in London. 15, 9983-9996, doi: 10.5194/acp-15-9983-2015. Hopkins, J. Lidster, R.
NASA has a suite of incremental goals for demonstrating the feasibility of aircraft technology and air traffic management techniques that can minimize the environmental effects of air transportation by: Enabling aircraft to burn 33% less fuel than today’s most efficient models by 2015, 50% less by 2020, and better than 50% less by 2025.
Short-lived climate pollutants (SLCPs) include methane, tropospheric ozone, black carbon, and fluorinated gases. Senate Bill 605 (Lara, Chapter 523, Statutes of 2014) requires ARB, in coordination with other state agencies and local air districts, to develop a SLCP Strategy by the end of 2015, to further reduce SLCP emissions in California.
the second, starting in 2015, brings in distributors of transportation fuels, natural gas and other fuels. The cap then declines about 2% in 2014 and then about 3% annually from 2015 to 2020. the destruction of existing stores of ozone-depleting substances in the U.S.
The multi-filter was designed especially for the SPA platform and will first appear in the all-new XC90 in the beginning of 2015. Ground-level ozone. Drivers can breathe easier because most microscopic, hazardous “fine dust” particles will now be prevented from entering the car. Hydrocarbons. Gases and unpleasant odors.
ppm in 2015 because of a combination of human activities and a strong El Niño event. increase from 2015 to 2016 alone, according to figures from the US National Oceanic and Atmospheric Administration quoted in the bulletin. ppm in 2015. Globally averaged concentrations of CO 2 reached 403.3 This record annual increase of 3.3
As with the earlier assessment, this study consists of two separate, but related, analyses: greenhouse gas emissions from 2015-2050, and air quality impacts in 2030. In the Lower GHG scenario, in 2050, total emissions for the electricity and transportation sectors could be reduced by 2610 million metric tons relative to 2015 levels.
The regulation will cover 360 businesses representing 600 facilities and is divided into two broad phases: an initial phase beginning in 2012 that will include all major industrial sources along with utilities; and, a second phase that starts in 2015 and brings in distributors of transportation fuels, natural gas and other fuels.
Starting in 2015, new diesel engines used in marine applications in the United States were required to meet Tier 4 emissions standards. This study underscores the need to increase funding for the replacement of older marine engines, reduce exposure to diesel emissions, and for EPA to update the service life assumptions used by the 2008 Rule.
Sources already subject to the 2012 NSPS requirements for VOC reductions that also would be covered by the proposed 2015 methane requirements would not have to install additional controls, because the controls to reduce VOCs reduce both pollutants.
microns or less (PM 2.5 ); and NO x emissions that lead to ozone and secondary PM. ARB will hold an applicant teleconference to answer questions regarding this Grant Solicitation on 21 October 2015. Statewide, they are responsible for 35% of the NO x emissions, 26% of the PM 2.5 emissions, and 5% of GHG emissions.
Since epichlorohydrin offers exceptional oil resistance, heat resistance, heat aging resistance, ozone resistance, and gas permeability, it is currently commonly used as a key compound in the production of rubber for components such as hoses. Engine and drive system hoses require a particularly high level of oil and heat resistance.
An estimated 68 stations are needed to support the anticipated rollout of these vehicles in 2015-2017. Currently, the state’s transportation sector accounts for nearly 40% of the state''s greenhouse gas emissions; more than 95% of all transportation energy consumed in California is petroleum-based.
The program, established in 2015, unites DOE’s supercomputing capabilities and expertise with American manufacturers to optimize production processes, enhance product quality and speed up design and testing cycles while decreasing energy consumption. The US Department of Energy (DOE) has awarded nearly $3.8
MARPOL Annex VI sets limits on NO x and SO x emissions from ship exhaust, and prohibits deliberate emissions of ozone-depleting substances. —Azzara and Rutherford, ICCT Working Paper 2015-1. Alyson Azzara and Dan Rutherford (2015) “ Air pollution from marine vessels in the US High Arctic in 2025 ” ICCT Working Paper 2015-1.
In the US, 200 million people live in areas where pollutants such as ozone and fine particulate matter exceed the standards. Air pollution is a serious public health issue, and exposures to concentrations of air pollutants at or above the current standards have been linked to neuroinflammation and neuropathology.
Accelerating the introduction of cleaner new Tier 4 interstate line-haul locomotives to operate in California and other western states (2015-2025). NO x helps create ground-level ozone, or smog. Implementation dates would be staggered to coincide with the development and commercial production of these advanced technologies.
The Haifa region began air quality monitoring some 30 years ago; the metropolitan area now has the densest air quality monitoring network in Israel with 27 continuous monitoring stations that measure criteria pollutants including sulfur oxides, nitrogen oxides, ozone, particulates and more.
ARB staff developed this strategy using a multi-pollutant scenario planning tool ( Vision 2.0 ) that quantifies changes in ozone and PM 2.5 Prior to the Board meeting, staff will hold a public workshop on 16 October 2015. Vision 2.0 ARB staff will provide the Board an informational briefing on the proposed strategy on 22 October.
and ozone in warm months, and with PM 2.5 , carbon monoxide, nitrogen dioxide and oxides of nitrogen in the cool season. Gillen, Bruce Nickerson (2015) “ Risk of pediatric asthma morbidity from multipollutant exposures ” Final report, California Air Resources Board Contract Nº 10-319. Hospital encounters for asthma were linked to PM 2.5
We organize all of the trending information in your field so you don't have to. Join 5,000+ users and stay up to date on the latest articles your peers are reading.
You know about us, now we want to get to know you!
Let's personalize your content
Let's get even more personalized
We recognize your account from another site in our network, please click 'Send Email' below to continue with verifying your account and setting a password.
Let's personalize your content