Sentences with word «chlorofluorocarbons»

To understand and quantify the ocean's sponge - like capabilities, the researchers used the two independent models of Atlantic Ocean currents together with shipboard observations of chlorofluorocarbons as a starting point.

Long - lived chlorine species, such as chlorofluorocarbons (CFCs), led to depletion of the stratospheric ozone layer in the 1980s, most drastically seen in the Antarctic.

Signed in the late 1980s, the protocol saved the ozone layer by ending the use of chlorofluorocarbons in refrigerants, household goods, and industrial products.

In the case of the attack on the ozone layer by chlorofluorocarbons, the impact could be made negligible by operating on the T factor alone, that is, ban the offending chemical.

In the real world, both chlorine and bromine are readily available in the stratosphere worldwide, especially chlorine from chlorofluorocarbons which are well mixed in the lower atmosphere (where they are stable), before entering the stratosphere where they are photochemically decomposed.

HCFCs are themselves replacements for chlorofluorocarbons (CFCs), ozone - destroying chemicals banned under the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer.

A study to be published later this month in the Journal of Geophysical Research - Atmospheres finds that climate change may substantially undo international efforts to restore the ozone layer by limiting emissions of ozone - eating gases called chlorofluorocarbons (CFCs).

HFCs became a significant climate issue in the wake of the success of the 1987 Montreal Protocol, which eliminated the emissions of ozone - depleting chemicals including chlorofluorocarbons (CFCs).

The effect of high UV on conifers and potentially other trees also suggests caution today in introducing chemicals that deplete Earth's ozone layer, which has yet to recover after a global ban on chlorofluorocarbon refrigerants in the 1980s instituted after ozone holes developed over the poles.

Wasn't the 1987 United Nations Montreal Protocol — an international agreement that set limits on the emission of ozone - eating compounds like chlorofluorocarbons, or CFCs — supposed to shrink Earth's life - threatening atmospheric bald spot?

Beginning in 1987, the internationally agreed - upon Montreal Protocol on Substances that Deplete the Ozone Layer has regulated these ozone - depleting compounds, such as chlorine - containing chlorofluorocarbons used in refrigerants and bromine - containing halon gases used as fire suppressants.

However, once the gas drifts into the upper atmosphere, sunlight breaks off bromine atoms, which eat up about 10 % as much ozone as does the chlorine from banned chlorofluorocarbon compounds.

They also replace chlorofluorocarbons in manufacturing semiconductors.

«Had the 1987 Montreal Protocol to curb anthropogenic ozone - depleting Chlorofluorocarbons not been implements, global stratospheric models suggest a worldwide average of 67 % reduction in ozone column thickness from 1980 to 2065.

The environment is getting a break on New Year's Day, at least in B.C., where you won't be allowed to fill a fire extinguisher with chlorofluorocarbons anymore, and in PEI, where every public utility will have to start looking for renewable energy sources to make up the 15 % of its annual output that is going to be mandated.

«We are quickly running out of time to prevent hugely dangerous, expensive, and perhaps unmanageable climate change,» wrote the report's authors, who include former U.N. Environment Programme chief Achim Steiner and Mexican chemist Mario Molina, who won the Nobel Prize for his role in discovering the threat that chlorofluorocarbon gases pose to the Earth's ozone layer.

For starters, salt (NaCl) contains chlorine, «which is a constituent of ozone - depleting CFCs [chlorofluorocarbons]-- so this could actually worsen ozone depletion,» Mann said.

A cheap and effective way of destroying chlorofluorocarbons (CFCs) without the use of an incinerator has been found by Japanese chemists.

On Nightline he stated: «it is man - made products which are causing the ozone depletion, yet Mount Pinatubo has put 570 times the amount of chlorine into the atmosphere in one eruption than all of man - made chlorofluorocarbons in one year».

Moreover, Shindell et al. found that anthropogenic ozone depletion (via chlorofluorocarbon emissions) may have reduced the impact of UV variability on the climate, and may have even offset it entirely.

It is a template for how ozone destruction by human produced Chlorofluorocarbons (CFC) was a test run for the deception that human CO2 is causing global warming.

Natural capital degradation: simplified summary of how chlorofluorocarbons (CFCs) and other chlorine - containing compounds can destroy ozone in the stratosphere faster than it is formed.

Industries have collapsed in the past because of disruptive technologies (see: the typewriter), environmental concerns (see: chlorofluorocarbon manufacture), or cheaper alternatives (see: scribes).

«Reduced concentrations of gases such as methane and the [chlorofluorocarbons] eases the [climate change] concern, but these contributions are small compared to the release of carbon dioxide by the burning of coal, gas and oil.»

Volatile organic compounds (VOCs)-- Organic compounds which typically have a boiling point less than or equal to 250 °C; for example chlorofluorocarbons (CFCs) and formaldehyde.

Betsy Weatherhead, a coauthor of the study, attributes the apparent improvement to international measures taken to reduce chlorofluorocarbons and other ozone - strafing chemicals.

Moreover, Shindell et al. found that anthropogenic ozone depletion (via chlorofluorocarbon emissions) may have reduced the impact of UV variability on the climate, and may have even offset it entirely.

These particles host the chemical reactions by which long - lived chlorofluorocarbons catalyse the breakdown of ozone.»

It found this month significant progress in just four: eliminating chlorofluorocarbons that punched a hole in the Earth's protective ozone layer; the removal of lead from gasoline that caused human health problems; improved access to clean water; and boosting research to reduce ocean pollution.

A program to reverse CH4 growth would require global cooperation, but it could be a positive, enabling experience, analogous to the global program to control chlorofluorocarbons.

Orsi, A. H., Smethie, W. M. Jr & Bullister, J. L. On the total input of Antarctic waters to the deep ocean: a preliminary estimate from chlorofluorocarbon measurements.

Some five years before the 1992 Rio Earth Summit, a smaller agreement was taking shape in Montreal on regulating chlorofluorocarbon (CFC) emissions, judged to be the cause of ozone depletion.

Several years ago, a team led by Qing - Bin Lu of the University of Sherbrooke in Quebec, Canada, reported laboratory experiments suggesting that electrons liberated by cosmic - ray collisions could break down chlorofluorocarbon molecules, releasing chlorine atoms that tear ozone molecules apart.

Facebook's new server farm in Prineville, for example, cools itself completely with the surrounding air, which has itself been cooled through evaporation rather than an air - conditioning chiller employing ozone - destroying and greenhouse - exacerbating chlorofluorocarbons or a cooling tower.

To compound the problem, the liquids used for all this comfort — first chlorofluorocarbons and now hydrofluorocarbons — are super-strength greenhouse gases.

That international treaty, implemented in 1989, banned ozone - depleting chemicals called chlorofluorocarbons worldwide.

Humans, for example, only dumped chlorofluorocarbons (CFCs) into the atmosphere for a few decades before realizing thedamage to the ozone and reducing CFC emissions.

NASA's James Webb Space Telescope, due to launch in 2018, should be powerful enough to detect chlorofluorocarbons, CFCs.

I was saddened to learn today of the passing on Saturday of F. Sherwood Rowland, a remarkable scientist, engaged citizen and professor best known for sharing the 1995 Nobel Prize in Chemistry for work revealing the impact of synthetic chlorofluorocarbons on the atmosphere's protective ozone layer.

McNeil et al. (2003), Anthropogenic CO2 uptake by the ocean based on the global chlorofluorocarbon data set, Science, Vol 299, 235 - 239.

Some might point to the phaseout of ozone - destroying chlorofluorocarbons under the Montreal Protocol, others to China's one - child policy or the spread of family planning initiatives in places as varied as Thailand and Iran.