Sentences with phrase «high ozone levels in»

Fracking has been linked to groundwater contamination in Pennsylvania, high ozone levels in Wyoming and to headaches, sore throats and difficulty breathing for people living close to wells in Colorado.

Not exact matches

Everything that has happened since then, including the greenhouse effect and the hole in the ozone layer, makes it clear that a future world could not sustain a population of even the present number at a higher level of industrial development without reaching environmental limits.

Simulations that don't include the effect of CH2Cl2 suggest that high - altitude ozone in the Antarctic will return to pre-1980 levels, the concentration measured before CFCs and other ozone - destroying chemicals were recognized as a problem, in 2065.

And while ozone high in the atmosphere helps shield Earth from the sun's ultraviolet radiation, at ground level, it mixes with fine particulates to form breath - choking smog.

As shown in previous studies, the litter from the polluted site, which had endured high levels of atmospheric nitrogen oxides and ozone, had higher nitrogen content than litter from the clean site.

In this study in Timothy grass, researchers led by environmental health scientist Christine Rogers of the UMass Amherst School of Public Health and Health Sciences (SPHHS) determined the interactive effects of CO2 and ozone at projected higher levels on pollen production and concentrations of a Timothy grass pollen protein that is a major human allergeIn this study in Timothy grass, researchers led by environmental health scientist Christine Rogers of the UMass Amherst School of Public Health and Health Sciences (SPHHS) determined the interactive effects of CO2 and ozone at projected higher levels on pollen production and concentrations of a Timothy grass pollen protein that is a major human allergein Timothy grass, researchers led by environmental health scientist Christine Rogers of the UMass Amherst School of Public Health and Health Sciences (SPHHS) determined the interactive effects of CO2 and ozone at projected higher levels on pollen production and concentrations of a Timothy grass pollen protein that is a major human allergen.

Zatko and her adviser at the University of Washington in Seattle realized she could join an ongoing research project in Utah that was studying causes of the area's unusually high ozone levels during winter.

The Antarctic ozone hole forms and expands during the Southern Hemisphere spring (August and September) because of the high levels of chemically active forms of chlorine and bromine in the stratosphere.

In the high atmosphere, ozone plays a crucial role in shielding the surface from harmful levels of ultraviolet lighIn the high atmosphere, ozone plays a crucial role in shielding the surface from harmful levels of ultraviolet lighin shielding the surface from harmful levels of ultraviolet light.

Air monitoring by researchers in 2000 found levels of volatile organic compounds — highly reactive ozone precursors such as benzene, known as VOCs — were 10 to 100 times higher than what had previously been estimated.

In some instances, ozone levels are higher in the suburbs than in nearby citieIn some instances, ozone levels are higher in the suburbs than in nearby citiein the suburbs than in nearby citiein nearby cities.

The formation of large areas of high pressure in the lower atmosphere both lowers ozone levels, by squeezing the ozone layer above, and may provide the very cold conditions in which ozone destruction is greatest.

Ozone doesn't just live high in Earth's atmosphere; near the ground, it contributes to smog, and ground - level ozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burOzone doesn't just live high in Earth's atmosphere; near the ground, it contributes to smog, and ground - level ozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burning.

In addition, he says, since CFCs are not particularly soluble in water, they would not be present in cloud - born ice particles in very high concentrations, so the mechanism Lu and Sanche propose would not dissociate enough CFCs to have a big impact on ozone levelIn addition, he says, since CFCs are not particularly soluble in water, they would not be present in cloud - born ice particles in very high concentrations, so the mechanism Lu and Sanche propose would not dissociate enough CFCs to have a big impact on ozone levelin water, they would not be present in cloud - born ice particles in very high concentrations, so the mechanism Lu and Sanche propose would not dissociate enough CFCs to have a big impact on ozone levelin cloud - born ice particles in very high concentrations, so the mechanism Lu and Sanche propose would not dissociate enough CFCs to have a big impact on ozone levelin very high concentrations, so the mechanism Lu and Sanche propose would not dissociate enough CFCs to have a big impact on ozone levels.

This is because warmer temperatures and other changes in the atmosphere related to a changing climate, including higher atmospheric levels of methane, spur chemical reactions that lead to ozone.

The ozone measurements, taken between 2 and 6 miles in altitude (3 - 10 kilometers) over a large part of the eastern Indian Ocean, were as high as 80 parts per billion - levels similar to a polluted day in a U.S. city and several times more than normal.

And it could explain why past studies measured higher than expected levels of ozone - damaging chemicals in the stratosphere, Rex says.

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.

ozone A colorless gas that forms high in the atmosphere and at ground level.

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].

In a cooperative effort between Duke and Duke Kunshan University, researchers found higher exposure to ground - level ozone led to higher blood pressure and blood platelet activation — risk factors for cardiovascular health.

Higher levels of carbon dioxide, however, do have an indirect effect on the ozone layer in the stratosphere.

``... While [ozone depleting substance] ODS levels remain high, a large stratospheric sulfuric aerosol enhancement due to a major volcanic eruption or geoengineering activities would result in a substantial chemical depletion of ozone over much of the globe.»

Ozone helps shield the planet when it's high in the atmosphere, but at ground level it is a pollutant that can make asthma symptoms worse.

North of Los Angeles, the area also has the second - highest level of ozone pollution in the U.S. Mountains surround the valley on three sides, creating inversion layers that trap pollution, with little wind to carry it away.

Dear Dr. Daniel: I live in a city which has a high level of ozone and particulates, but I lived here for many years without making my asthma worse.

Tuft's photographs document the effects of high levels of these light spectrums, usually found in places suffering from ozone depletion.

• increases in malnutrition and consequent disorders, with implications for child growth and development; • increased deaths, disease and injury due to heat waves, floods, storms, fires and droughts; • the increased burden of diarrheal disease; • the increased frequency of cardio - respiratory diseases due to higher concentrations of ground - level ozone related to climate change; and, • the altered spatial distribution of some infectious disease vectors.

We will now be able to measure and track Sun - induced space weather as well as global climactic trends in ozone levels, aerosols, vegetation, volcanic ash, and Earth reflectivity, all in high resolution; just the kind of data our civilization needs to make informed cultural, political, and scientific decisions that affect our future.

Crops, which tend to be situated in areas with high ozone levels, would be particularly stunted because they are fertilized.

They indicate that higher ozone concentrations, even at levels below current air quality standards in most of the world, have significant negative effects on worker productivity.

Scientists monitoring the highest levels of the atmosphere say they have detected a slowing in the rate of destruction of Earth» s protective veil of ozone, the first sign that the phasing out of chemicals that harm the ozone layer is having a restorative effect.

We tend to go under in the winter — however, higher wintertime ozone levels are a somewhat new phenomenon being observed.»

In 2013, Fort Collins and Denver received «F» grades from the American Lung Association for high levels of ground - level ozone, a key element of smog; Colorado Springs received a «C» grade.

Heat, flood and drought - related mortality and morbidity may increase; changes in the distribution of plant species and animals are likely to contribute to changing ranges of infectious diseases and allergic disorders; higher concentrations of ground - level ozone and particulate matter in urban areas may increase the frequency of cardio - respiratory and cardio - vascular diseases.

* 20 to 30 % of plant and animal species likely to be at increased risk of extinction * many millions more people than today projected to experience floods every year due to sea level rise * increases in malnutrition; increased deaths, diseases and injury due to extreme weather events; increased burden of diarrhoeal diseases; increased frequency of cardio - respiratory diseases due to higher concentrations of ground - level ozone in urban areas * hundreds of millions of people exposed to increased water stress

A paragraph from a 2007 United Nations - sponsored report provides a depressing introduction: «In the air, (reactive nitrogen) can contribute to higher levels of ozone in the lower atmosphere, causing respiratory ailments and damaging vegetatioIn the air, (reactive nitrogen) can contribute to higher levels of ozone in the lower atmosphere, causing respiratory ailments and damaging vegetatioin the lower atmosphere, causing respiratory ailments and damaging vegetation.

«increases in malnutrition; increased deaths, diseases and injury due to extreme weather events; increased burden of diarrhoeal diseases; increased frequency of cardio - respiratory diseases due to higher concentrations of ground - level ozone in urban areas»

o they have a high level of certainty that ground level ozone in the future will be higher, lower, or about the same (yes, they actually said that!)

High levels of ozone are usually formed in the heat of the afternoon and early evening, dissipating during the cooler nights.

During extreme heat events, nighttime temperatures in the region's big cities are generally several degrees higher28 than surrounding regions, leading to increased heat - related death among those less able to recover from the heat of the day.36 Since the hottest days in the Northeast are often associated with high concentrations of ground - level ozone and other pollutants, 37 the combination of heat stress and poor air quality can pose a major health risk to vulnerable groups: young children, the elderly, and those with pre-existing health conditions including asthma.29 Vulnerability is further increased as key infrastructure, including electricity for potentially life - saving air conditioning, is more likely to fail precisely when it is most needed — when demand exceeds available supply.

Ozone helps shield the planet when it's high in the atmosphere, but at ground level it is a pollutant that can make asthma symptoms worse.

Lower ozone levels in the stratosphere may result in more skin cancers, cataracts, and may result in higher incidence of certain diseases.

In reality, carbon dioxide is of course a factor in climate change, and higher temperatures can lead to higher ozone pollution and pollen levels that trigger more asthma attackIn reality, carbon dioxide is of course a factor in climate change, and higher temperatures can lead to higher ozone pollution and pollen levels that trigger more asthma attackin climate change, and higher temperatures can lead to higher ozone pollution and pollen levels that trigger more asthma attacks.

Model predictions show that ozone levels tend to be highest in regions where crops are grown.

For example, chapter ten, «Ice melts, sea level rises,» discusses the disappearance of tropical mountain glaciers, estimates of sea level rise in the present century, estimates of its costs — the EPA estimated in 1991 that a one - meter rise would cost the US alone between $ 270 billion and $ 475 billion — evidence of past oceanic high - water marks and glacial extents, the dynamics of ice sheet disintegration, the thermal expansion of seawater, icequakes and meltponds, ice mass loss and gain in Greenland and Antarctica, the ozone hole, and the existence and significance of «marine ice sheets.»

«In 1999, when Houston's ozone levels were the highest in the nation, the state of Texas conducted several studies that found large industrial leaks,» the report noteIn 1999, when Houston's ozone levels were the highest in the nation, the state of Texas conducted several studies that found large industrial leaks,» the report notein the nation, the state of Texas conducted several studies that found large industrial leaks,» the report notes.

At the higher energy level, different mechanisms kick in, like Sudden Stratospheric Warming (energy relief mainly in the NH) and deep convection driven tropical ozone depletion.

The aldehyde intermediate is the primary reason that ethanol will always result in higher final ozone levels.

In several cities with relatively low ground level ozone, the increase in premature death was greater than the premature mortality of cities with high levels of ground level ozonIn several cities with relatively low ground level ozone, the increase in premature death was greater than the premature mortality of cities with high levels of ground level ozonin premature death was greater than the premature mortality of cities with high levels of ground level ozone.