White Sands – NM Gypsum sand.

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Presentation transcript:

White Sands – NM Gypsum sand

Lake Lucerno Gypsum crystals

GROUP QUESTION The Gypsum dunes in White sands constantly migrate NE, but never leave the park. How does this happen?

How do Earth’s homeostatic systems work? … and how delicate is the balance?

OZONE

CFC’s – Chlorofluorocarbons – “inert” refrigerants and propellants

Ozone has decreased globally by 3% over past 20 years by 7% over 40 years in Australia

… and by 50% over past 25 years in Antarctica

Individual PRS How is the decrease in stratospheric ozone related to global warming? Ozone destroys greenhouse gases Ozone is produced by burning fossils fuels Ozone can be used to make Oxygen Glaciers trap large amounts of ozone They were both noticed at the same time

What, if anything, have we done to reduce stratospheric ozone depletion?

Global Warming and greenhouse gases

Kyoto Protocol – negotiated 1997-1998 -- went into effect Feb. 2005 after being ratified by Russia -- would result in dropping GHG emissions below 1990 level by 2012

What, if anything, will you do to reduce GHG emissions? Do you think the government needs to get involved and, if so, how? If we were to hold our rate of GHG production to 1990 levels, what climatic results would you expect?