HOME >> BIOLOGY >> NEWS
Refrigerator disposal releases ozone-depleting chemicals

nces normally last for around 20 years, Kjeldsen said.

"Use of these results may help evaluate changes in the atmospheric concentrations of CFC-11 in the future," he said. "They add to the understanding of a very important source of CFCs."

Chlorine contained in CFCs damages the earth's ozone layer, a thin shield of oxygen that protects the planet from ultraviolet radiation. A single chlorine atom — contained in CFCs and also found naturally — can destroy more than 100,000 ozone molecules, although ozone can be reformed over time by a chemical reaction stimulated by sunlight. The upper part of the atmosphere known as the stratosphere contains approximately 3 billion kilograms of ozone — enough to create a layer about an eighth of an inch thick that circles the globe.

Depletion of the ozone layer leads to higher levels of a certain type of ultraviolet (UV) radiation reaching the earth's surface. Previous testing has shown that higher UV-B levels increase the risk of skin cancer, harm plant life, reduce the population of sea life and contribute to the increase of carbon dioxide and other greenhouse gases believed to be responsible for atmospheric warming, according to the U.S. Environmental Protection Agency.

Because of the dangers of exhausting the ozone layer, more than 120 countries signed the 1987 "Montreal Protocol" to control CFC emissions. After 1995, when production of most CFCs stopped, they ceased being used in aerosol cans and in the coolant known as Freon. New products, including refrigerators, use substitutes with similar properties. Additional amounts of CFC-11 can be found in air conditioners, insulation and some industrial appliances. A different type of CFC is used in the product marketed as Styrofoam.


'"/>

Contact: Beverly Hassell
b_hassell@acs.org
202-872-4065
American Chemical Society
17-Jun-2001


Page: 1 2

Related biology news :

1. Skull Of Refrigerator-Size Ancient Armadillo Finds A Home At UF
2. Circulation of disaster myths in Haiti could hinder appropriate disposal of bodies
3. Efficient plastic nuggets key to agricultural plastic waste disposal
4. RING Finger proteins target cellular molecules for disposal
5. Nuclear waste disposal: A safer solution?
6. New molecular key to disposal of dying cells
7. 5AM Solutions releases Microarray Enterprise Manage(TM) Software
8. Joslin Diabetes Center releases new low impact exercise video
9. The American Academy of Microbiology releases report
10. Academy Harbor Consortium releases letter on mercury to President Bush
11. The American Academy of Microbiology releases report

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Refrigerator disposal releases ozone depleting chemicals

(Date:12/22/2014)...  The 2014 Holiday Season may be the brightest ever ... that the long anticipated floodgates for consumer biometrics may ... smart phones, tablets, and wearable mobile devices that incorporate ... users with nearly 4.8 billion biometric devices by 2020.   ...
(Date:12/19/2014)... MOUNTAIN VIEW, Calif. , Dec. 18, 2014  23andMe, Inc., ... a study that pinpoints fine-scale differences in genetic ancestry of ... Since immigrants first arrived more than four hundred ... served as a meeting place for peoples from different continents. ...
(Date:12/17/2014)... Dec. 15, 2014 The Defense Logistics Agency is ... and prevent counterfeit microcircuits from entering into its supply ... in-house microcircuit anti-counterfeit initiative dubbed DNA marking. The capability ... their reliability throughout the supply chain. The new quality ...
Breaking Biology News(10 mins):First Season of Holiday Shopping with Mobile Biometric Payments Wraps Up With a Present for Biometrics Industry: A Rosy Forecast for More Than 2 Billion Users of 4.8 Billion Mobile Biometric Devices by 2020 223andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3
(Date:1/22/2015)... 22, 2015 zFlo Motion , a ... announce an exciting product from a new partner. STT-Systems ... over the past 15 years, with offerings in the optical-motion ... 3D IMU system (inertial measurement unit), iSen, is opening eyes ...
(Date:1/22/2015)... Wilmington, DE (PRWEB) January 22, 2015 ... the Pistoia Alliance, which helps companies check the legal ... set to expand to China. , As their ... companies are globally adopting software solutions built as a ...
(Date:1/22/2015)... Diagenode, Inc., a leading global provider ... complete solutions for epigenetics research, recently launched a ... need for manual processing. The new ChIPettor System ... histones or transcription factors and a semi-automated pipette ...
(Date:1/22/2015)... 2015   Cypher Genomics, Inc., the leading ... SQNM ), the leading molecular diagnostics company, ... noninvasive prenatal tests (NIPT). Through this agreement, Sequenom ... to advance analysis of clinically-relevant fetal sub-chromosomal variants ...
Breaking Biology Technology:3D Motion Capture Just Got Easy 2Global Compliance Service for Controlled Substances to Expand to China 2Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2Cypher Genomics and Sequenom Announce Development Agreement 2Cypher Genomics and Sequenom Announce Development Agreement 3Cypher Genomics and Sequenom Announce Development Agreement 4
Cached News: