Inscrit le: 01 Mar 2018
|Posté le: Ven 27 Avr - 03:34 (2018) Sujet du message: Dames Adidas Superstar Lotus Print Wit FlowerA F5582 Goedkoo
|GENEVA Cheap Air Max TN , Sept. 10 (Xinhua) -- The Earth's protective ozone layer is well on track to recovery in the next few decades thanks to concerted international action against ozone depleting substances, said a UN report on Wednesday.
The conclusion was made in the assessment published on Wednesday by the United Nations Environment Program (UNEP) and the World Meteorological Organization (WMO).
The Assessment for Decision-Makers, a summary document of the Scientific Assessment of Ozone Depletion 2014, said actions taken under the Montreal Protocol on Substances that Deplete the Ozone Layer, signed on Sept. 16, 1987 Cheap Air Max 95 , to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion, are enabling the return of the ozone layer to benchmark 1980 levels.
It said the Montreal Protocol and associated agreements have led to decreases in the atmospheric abundance of gases, such as CFCs (chlorofluorocarbons) and halons, once used in products such as refrigerators, spray cans, insulation foam and fire suppression.
In 1987 Cheap Air Max 90 , ozone-depleting substances contributed about 10 gigatonnes CO2-equivalent emissions per year. The Montreal Protocol has now reduced these emissions by more than 90 percent.
Under full compliance with the Montreal Protocol, the ozone layer is expected to recover to 1980 benchmark levels, the time before significant ozone layer depletion, before the middle of the century in mid-latitudes and the Arctic, and somewhat later in the Antarctic.
However, the assessment warned the climate benefits of the Montreal Protocol could be significantly offset by projected emissions of HFCs (hydrofluorocarbons) used to replace ozone depleting substances.
Hydrofluorocarbons (HFCs) do not harm the ozone layer but many of them are potent greenhouse gases. They currently contribute about 0.5 gigatonnes of CO2-equivalent emissions per year.
These emissions are growing at a rate of about 7 percent per year. Left unabated Cheap Air Max , they can be expected to contribute significantly to climate change in the next decades.
Meanwhile, the assessment said the ozone layer in the second half of the 21st century will largely depend on concentrations of CO2, methane and nitrous oxide, the three main long-lived greenhouse gases in the atmosphere.
Overall, CO2 and methane tend to increase global ozone levels. By contrast, nitrous oxide Cheap Nike Air Max TN Online , a by-product of food production, is both a powerful greenhouse gas and an ozone depleting gas, and is likely to become more important in future ozone depletion.
"This latest assessment provides solid science to policy-makers about the intricate relationship between ozone and climate and the need for mutually-supportive measures to protect life on earth for future generations," WMO Secretary-General Michel Jarraud said in a statement.
"International action on the ozone layer is a major environmental success story, this should encourage us to display the same level of urgency and unity to tackle the even greater challenge of climate change," he added.
The Scientific Assessment of Ozone Depletion 2014 Cheap Nike Air Max 95 Online , which is the first comprehensive update in four years, will be presented at the annual Meeting of the Parties to the Montreal Protocol, to be held in Paris in November 2014. The full body of the report will be issued in early 2015.
TORONTO, July 10 (Xinhua) -- Coffee lovers who like to attend rock music concerts or work at airports should be cautious now as a recent study indicates that caffeine causes serious impact on hearing.
According to a research by the McGill University in Canada, regular caffeine consumption can greatly impede hearing recovery from loud noise, even making the damage permanent.
"When the ear is exposed to loud noise Cheap Nike Air Max 90 Online , it can suffer from a temporary hearing reduction, also called auditory temporary threshold shift. This disorder is usually reversible in the first 72 hours after the exposure, but if symptoms persist, the damage could become permanent," Dr. Faisal Zawawi, an otolaryngologist at McGill Cheap Nike Air Max Online , told a press release.
The researchers found this impact through an experiment on guinea pigs. They grouped the pigs and tested them in environments of noise without coffee, and noise with coffee.
The noise the animals were exposed to for one hour per day is similar as what people hear at a rock concert. After eight days, significant difference of hearing loss is recorded between the two groups, according to the research team.
In 2015, the European Food Safety Authority published an advice that caffeine intakes from all sources up to 400 mg per day and single doses of 200 mg might be safe for adults in the general population.
But the McGill research suggests that exposure to loud noises coupled with daily consumption of 25 mg of caffeine may have a clear negative impact on hearing recovery.
KATHMANDU, March 31 (Xinhua) -- Nepal on Thursday took strong objection to the reference to the country in the Joint Statement issued after the 13th EU-India summit in Brussels on March 30.
In their joint statement Cheap Air Max TN Online , the European Union and India had mentioned about Nepal's Constitutional issues, urging the country to address the constitution-related issues in a time bound matter.
In the strongly-worded statement, Nepal's Ministry of Foreign Affairs has firmly objected the statement, saying that resolving the Constitution-related issues are purely internal affairs of Nepal and no foreign countries should interfere in it.
"The constitution making and its promulgation are essentially internal matters of a country. Nepal has now moved ahead along the path of political stability and economic development. Against this backdrop, the EU-India Joint Statement not only hurts the sentiments of the people of Nepal but also defies the fundamental principle of non-interference in internal affairs of a country in .