Sentences with phrase «ozone exposure of»

A month after the EPA released its new standards, a National Research Council report concluded that premature deaths related to ozone exposure of less than 24 hours are more likely among those with pre-existing diseases.

Not exact matches

In 2004, Looy and her former Ph.D. advisor Henk Visscher proposed one way this might have played out, bases on fossilized abnormal plant spores found worldwide: volcanic gases — halocarbons like methyl chloride and methyl bromide — destroyed much or all of Earth's ozone layer, boosting UV - B exposure that would have affected life and potentially increased the genetic mutation rates in pollen and spores of plants worldwide.

In some parts of Asia, Africa and South America, the researchers identified data gaps which prevented them from characterizing ozone pollution exposure patterns.

However, limited and scattered ozone datasets left scientists unable to answer basic questions about the distribution and trends in ozone pollution in many parts of the world: In which regions of the world do people face the greatest ozone exposure?

So Weschler and Wisthaler simulated a typical office environment at the Technical University of Denmark in Copenhagen — two people in a carpeted 28.5 — cubic meter room at a temperature of 23 degrees Celsius with two small stainless steel tables, two chairs, two flat - screen LCD monitors, two headsets, one walkie - talkie, one small mixing fan, a few books, two laptops, two bottles of water and ozone concentrations that reached roughly 32 parts per billion, an average exposure for a hot, smoggy day.

The researchers then linked the healthcare - related emissions to specific environmental and health outcomes, including global warming; ozone depletion; respiratory disease from air pollutants; cancer from chemical exposure; and the environmental effects of acid rain, among others.

While elevated ozone did decrease the Phl p 5 allergen content in pollen, «the strong CO2 - stimulation of pollen production suggests increased exposure to Timothy grass allergen overall,» even if O3 projections are realized, the authors note.

His team's work has shown only that exposure to such massive bursts of radiation would almost certainly peel away a planet's protective ozone layer.

«While our study mainly followed SC infants, we also had the opportunity to assess a small sample of pregnancies that were conceived through ART, and observed a higher impact of air pollution — particularly with regard to ozone exposure.

A new study of 60 million Americans — about 97 % of people age 65 and older in the United States — shows that long - term exposure to airborne fine particulate matter (PM2.5) and ozone increases the risk of premature death, even when that exposure is at levels below the National Ambient Air Quality Standards (NAAQS) currently established by the U.S. Environmental Protection Agency.

Specifically, a 4 ug / m3 increase in exposure to small particulate matter of less than 2.5 in diameter (PM2.5) was associated with a 2 % increased risk of stillbirth, while exposure to nitrogen dioxide, carbon monoxide, PM10 and ozone were also linked to a heightened risk.

«EPA acknowledges the newer studies on ozone «do not materially change any of the broad scientific conclusions regarding the health effects of exposure,»» the group said in a statement.

Such a standard would be based on a cumulative, weighted total of daily 12 - hour ozone exposures to plants and crops over a three - month period.

In this section, we consider the population within a 5 km radius around a TOAR ozone monitoring station; hereafter referred to as the «monitored population», and estimate their exposure in terms of exceedances of one metric: NDGT60.

These are just a few of the respiratory illnesses that are associated with exposure to ozone and air pollution particles.

These findings further suggest reduced exposure to high levels of ozone in parts of North America and Europe, but increased exposure to moderate to high ozone levels at a small proportion of urban locations, although many sites in these two regions have non-significant trends.

This assumes that ambient ozone concentrations measured at the monitor location are representative of population exposure (see e.g. Meng et al. 2012; US EPA 2013 for a discussion of the validity of this assumption).

As noted above, the first three metrics are associated with regulatory standards in different world regions for the protection of human health to acute or short - term exposure to ozone.

This shift, coupled with limited ozone monitoring in most developing nations, has left a number of fundamental outstanding questions: Which regions of the world have the greatest human and plant exposure to ozone pollution?

Plants and animals have adapted to the normal seasonal cycle of total ozone and UV and are not used to high UV - exposure during the part of their lifecycle that takes place in spring (e.g. germination, growths of buds, algea blooms in the Arctic ocean,...).

Long - term exposure to high levels of road traffic and ozone significantly increases the risk of asthma symptoms, asthma attacks or the need for use of asthma medications, according to a new study published in the European Respiratory Journal [1].

The data showed that high traffic intensity, ozone exposure and 8 - iso concentration increased the risk of current asthma.

Methods: The team used new relationships between chronic mortality and exposure to fine particulates and ozone, global modeling methods and new future climate scenarios to simulate the co-benefits of global greenhouse gas reductions on air quality and human health.

An additional recent analysis of the ACS cohort evaluated the health effects of ozone compared with PM2.5.87 The findings reconfirmed the independent cardiovascular mortality increase related to fine - particle exposure.

The remnants of the vortex — which contain the depleted ozone — typically pass overhead at about 45 to 50 degrees north latitude, over parts of Europe and North America, for a few days in spring, causing the potential for ultraviolet (UV) radiation exposure to increase, said Rex.

Plants and animals have adapted to the normal seasonal cycle of total ozone and UV and are not used to high UV - exposure during the part of their lifecycle that takes place in spring (e.g. germination, growths of buds, algea blooms in the Arctic ocean,...).

The response of leaf photosynthesis and metabolite profiles to ozone (O3) exposure ranging from 37 to 116 ppb was investigated in two soybean cultivars Dwight and IA3010 in the field...

Ozone layer is NOT recovering over some of Earth's most highly populated areas putting billions at risk of exposure to cancer - causing UV rays...

This article quantifies the global impact of long - term ozone exposure on respiratory mortality.

By 2090, as many as 2 billion people globally will be breathing air above the WHO «safe» level; one paper last month showed that, among other effects, a pregnant mother's exposure to ozone raises the child's risk of autism (as much as tenfold, combined with other environmental factors).

Exposure to high levels of ozone (O3) and airborne particulate matter (PM10) during the second and third trimester were found to contribute to babies a with low birth rate.

The report called for more research on the link between mortality and ozone exposure over a period of weeks and years.

Instead of using bleach or other harsh disinfectants to sanitize sports gear, toys, office and health care equipment, or other items that are handled by multiple people everyday, a new sanitizing unit that uses ozone to kill bacteria and viruses can be used instead, saving time and reducing the amount of exposure to harsh chemicals.