Sentences with phrase «causes ozone»

The added oxygen causes ozone to be formed during combustion.

Robert Watson, an atmospheric chemist at the University of East Anglia in the United Kindgdom, is being honored for his studies of the ozone hole and work toward an international agreement to ban the use of the chemicals causing ozone depletion; he later chaired the Intergovernmental Panel on Climate Change.

Volatile organohalogens like chloromethane strongly influence atmospheric chemistry and thereby Earth's climate by causing ozone depletion when released into the atmosphere.

Once miraculous, chlorofluorocarbons that caused ozone damage are now helping scientists track its effects on the Southern Ocean.

Similar clouds in the Antarctic, which cause the ozone hole there, have been observed from American spy planes, but the less stable northern clouds have been studied only with balloons and satellites.

Harmful chemicals, known as chlorofluorocarbons, are the main culprits and cause the ozone to get thinner and thinner.

Cows produce methane gas which pollutes the atmosphere causing the ozone to become depleted!

«New peer - reviewed paper indicates that maybe cosmic rays, not CFCs, cause the ozone hole!».

With ozone it was chlorofluorocarbons (CFC) causing ozone depletion, especially over Antarctica, but there was never any proof.

They produced a static condition when the major natural mechanism causing ozone variation over Antarctica is an intense atmospheric circulation system associated with the Circumpolar Vortex.

«Industrial chlorofluorocarbons that cause ozone depletion have been phased out under the Montreal Protocol.

My understanding is that experimental data, (as opposed to made - up hypothetical data), shows that the supposed mechanism for CFC caused ozone depletion is at least incomplete.

Fourth, there was a point in late 2006 and 2007 when there was some question about whether CFCs were causing the ozone hole.

Scientists then were denying or withholding publication of data from new sensors that did not fit the agenda of the man - caused ozone depletion scare.

Additionally, a recent scientific paper revealed that HFCs actually do cause ozone depletion which will be significant to the climate as concentrations of these gases continue to accumulate in the atmosphere.

The Montreal Protocol has been able to phase out 98 percent of the chemicals that cause ozone depletion and can do the same with HFCs as they are used in the exact same industrial sectors.

In dealing with CFCs, governments, industry, and science — realizing that CFCs and related manmade chemicals caused ozone depletion — quickly developed ozone - safe substitutes.

Mark, steps WERE taken to curtail acid rain and CFCs that were causing ozone depletion.

They used to be chlorofluorocarbons (CFC) that were banned for damaging the ozone layer, and were replaced by HFCs don't cause ozone damage, but are more than a thousand times worse than CO2 as greenhouse gases.

Thus, we have traditionally studied the impact of carbon dioxide separately from the impact of sulphate aerosols and separately from the impacts of the emissions that cause ozone (the «precursors»).

Not exact matches

This «would create a persistent layer of black carbon particles in the northern stratosphere that could cause potentially significant changes in the global atmospheric circulation and distributions of ozone and temperature,» they concluded.

We managed to stop putting a hole in the ozone layer by phasing out the chemicals that were causing it (cholofluorocarbons) and, as a result, the hole is closing and there are millions fewer cases of skin cancer than there would otherwise have been.

Photocopiers are a source of potentially deadly ozone if the filter isn't periodically changed, and it's possible that even very small amounts can cause chest pain and irritation.

We have, for example, already taken some measures to deal with one of the probable causes of the growing holes in the ozone layer, and to reverse the destruction of European forests by acid rain.

By the late 1980s it became clear that global atmospheric pollution causing both the greenhouse effect and the hole in the ozone layer had become critical threats to life on earth (Henderson - Sellers & Blong 1989).

Marshalling convincing scientific data, they tell us that the environmental degradation caused by massive pollution of air water and land, threatens the very life of earth — fast depletion of non renewal resources, indeed of species themselves, the thinning of the ozone layer that exposes all living creatures to the danger of radiation, the build up of gases creating the greenhouse effect, increasing erosion by the sea — all these are brought out through their research.

Ozone is a powerful oxidant that can cause muscles in the airways to constrict, and make breathing more difficult.

Scientists have proposed that ozone depletion caused by periodic volcanic eruptions over nearly a million years was one cause of the end - Permian extinction, but how has been unclear.

Th experiment suggests that enhanced UV - B at the end of the Permian, caused by ozone depletion from volcanic eruptions, could have contributed to Earth's largest mass extinction.

Benca irradiated 18 - inch - tall, bonsai - like pines with UV - B dosages up to 13 times stronger than on Earth today, simulating the effects of ozone depletion caused by immense volcanic eruptions that occurred at the end of the Permian Period.

The combined processes of unburned leakage and incomplete combustion of LPG play a significant role in causing the excessive ozone characteristic of Mexico City.

Ever since its discovery in 1985, the springtime ozone hole over Antarctica has been an insistent reminder of humankind's ability to cause environmental harm.

Ground - level ozone is a secondary pollutant, meaning that it is not emitted directly, but forms when sunlight triggers reactions between natural and human - caused chemical emissions, known as ozone precursor gases.

Emissions from vehicles, power plants, industrial operations, and other human activities are a primary cause of surface ozone, which is one of six main pollutants regulated in the U.S. by the Clean Air Act.

Unlike global warming, however, everyone agrees on why ozone depletion is a threat, what causes it, and what to do about it.

«Despite some reductions in air pollutant emissions in Europe and North America, human health impacts from ozone are still a cause for concern across the world and are rising in parts of East Asia, with the potential for serious health effects on their populations,» said Zo?

The region's levels of ozone and particulate matter, two pollutants caused by both automobiles and industry, exceed national air quality standards.

The researchers found that while the amount of ozone depletion arising from VSLS in the atmosphere today is small compared to that caused by longer - lived gases, such as CFCs, VSLS - driven ozone depletion was found to be almost four times more efficient at influencing climate.

At present, naturally - emitted VSLS account for around 90 % of the total ozone loss caused by VSLS in the lower stratosphere.

This means the chemicals can reach the ozone layer before they are degraded and while they can still cause damage.

If the chemicals that were now discovered in unexpectedly large amounts can reach the ozone layer in significant quantities, they can cause damage.

Since it was discovered in 1985, the Antarctic ozone hole has been a potent symbol of humankind's ability to cause unintended environmental harm.

The annual Antarctic ozone hole has caused significant changes in Southern Hemisphere surface climate in the summer.

The 1987 international agreement phased out the industrial production of chlorofluorocarbons (CFCs): chlorine - containing chemicals that help trigger the destruction of stratospheric ozone, which screens out cancer - causing ultraviolet light.

An extensive body of prior research has revealed students have many misconceptions about climate change, confusing it, for example, with causing acid rain and ozone depletion, as well as linking it to skin cancer, the authors note.

The recent declines and disappearances of many frogs, toads, and salamanders have been blamed on a number of causes, including pathogenic infection, pesticides, pollutants, increased UV radiation from ozone depletion, and local drought spurred by climate change.

Its contribution to heating forcing (caused by greenhouse gases, ground - level ozone and «black carbon» [4]-RRB- is 12 % on average.

At high levels, tropospheric ozone can cause respiratory problems from asthma to emphysema.

Without the ozone layer, ultraviolet rays from the sun would reach the surface at nearly full force, causing skin cancer and, more seriously, killing off the tiny photosynthetic plankton in the ocean that provide oxygen to the atmosphere and bolster the bottom of the food chain.

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.