advertisement

GlobalChange OD

50 %
50 %
advertisement
Information about GlobalChange OD
Education

Published on February 20, 2008

Author: Paolina

Source: authorstream.com

advertisement

Global Change: Ozone Depletion:  Global Change: Ozone Depletion Environmental Sustainability Educational Resources prepared by Gregory A. Keoleian Associate Research Scientist, School of Natural Resources and Environment Co-Director, Center for Sustainable Systems University of Michigan Contents:  Contents Ozone Depletion Process [slide 4] Ozone Hole [slide 5] Ozone Hole [slide 6] Ozone Depleting Substances [slide 7] Ozone Depleting Substances [slide 8] Ozone Depleting Substances [slide 9] Ozone Depletion Potential [slide 10] Ozone Depletion Potential [slide 11] Impacts [slide 12] Slide3:  Montreal Protocol [slide 13] Additional Resources [slide 14] Ozone Depleting Substances:  Ozone Depleting Substances Chlorofluorocarbons (CFC’s) contains: Cl, F, C long-lived, non-toxic, non-corrosive, and non-flammable in 1960’s used in refrigerators, air conditioners, spray cans, solvents, foams phase out by 1996 in developed countries Slide8:  Hydrochlorofluorocarbons (HCFCs) contains: H, Cl, F, C first major replacement for CFC ODP’s range from 0.01 - 0.1 much less destructive by also ozone depleting reduce HCFC’s by 35% by 2004 in developed countries Hydrofuluorocarbons (HFC) contain: H, F, C do not deplete O3 some HFC’s have a high GWP Slide9:  Halons contain: Br, Cl (in some but not all), F, H (in some but not all), C Br many times more effective in destroying O3 ODPs range up to 10 used in fire extinguishers phase out by 1994 Methyl Bromide (CH3Br) an effective pesticide, used to fumigate ag soil and products ODP = 0.4 production in US will end 12/31/2000 Ozone Depletion Potential:  Ozone Depletion Potential Ozone Depletion Potential (ODP): a number that refers to the amount of ozone depletion caused by a substance The ODP is the ratio of the impact on ozone of a chemical compared to the impact of a similar mass of CFC-11. Ozone Depletion Potential:  Ozone Depletion Potential ODP of CFC-11 is defined to be 1.0. Other CFCs and HCFCs have ODPs that range from 0.01 to 1.0. Halons have ODPs ranging up to 10. Carbon tetrachloride has an ODP of 1.2 Methyl chloroform's ODP is 0.11. HFCs have zero ODP because they do not contain chlorine. Impacts:  Impacts Ozone layer absorbs most of the harmful UV-B radiation; more UV-B means: more melanoma and non-melanoma skin cancers more eye cataracts weakened immune systems reduced plant yields damage to ocean eco-ecosystems more damage to plastics Montreal Protocol:  Montreal Protocol Vienna Convention in 1985 framework agreement Montreal Protocol in 1987 Phase-out schedules for CFCs and halons London Amendment in 1990 accelerated phase outs; additional CFC’s, CCl4, CH3CCl3 Copenhagen Amendment in 1992 added methyl bromide, HBFCs, HCFCs Montreal Amendment in 1997 finalized phase-out schedules for methyl bromide Additional Resources:  Additional Resources US EPA web site: http://www.epa.gov/ozone/ NASA web site: http://www.nas.nasa.gov/Services/Education/Resources/TeacherWork/Ozone/Ozone.homepage.html

Add a comment

Related presentations

Related pages

The Future of Outsourcing - Impact on Jobs - keynote speaker

The Future of Outsourcing - Impact on Jobs - keynote speaker Written by Patrick Dixon. Futurist Keynote Speaker: Posts, Slides, Videos ...
Read more

carry on with #GLOBALCHANGE | Mašta Magazine

It might be true that it all got push with occupying an audience od Univercity, or maybe with building tents in main squaires of Spain, but from now on we ...
Read more

Future of the European Union - Enlarged or Broken?

The most likely scenario for the future of the European Union over the next decade and a half will be slow but steady progress towards integration, ...
Read more

Indigenous Peoples | National Climate Assessment

GlobalChange.gov. Welcome to the National Climate Assessment. The National Climate Assessment summarizes the impacts of climate change on the United States
Read more

Global Change 1: Clocks in Rocks

Clocks in Rocks: Isotopes and Age of Earth: format for printing In this lecture we learn: What is the age of the Earth and how is it determined? How have ...
Read more

globalchange.umich.edu - rankdirection.com

The official home page for the University of Michigan, Ann Arbor.. Get reviews for globalchange.umich.edu not globalchange. Is globalchange.umich.edu a ...
Read more

Threats To Global Biodiversity

Threats To Global Biodiversity. The worst thing that can happen during the 1980s is not energy depletion, economic collapse, limited nuclear war, ...
Read more

WHO | Biodiversity

What is biodiversity? Biodiversity underpins life on Earth, and refers to the variety found in biota from genetic make up of plants an animals to cultural ...
Read more

GLOBAL 2000 - die Österreichische Umweltschutzorganisation

Schon 16,707 E-Mails wurden verschickt. Helfen Sie uns, dass es 20,000 werden!
Read more