February 25, 2008
Shape preserving population scaled map, What do you notice? India and China are big
Resource Use and Other Atmospheric Impacts?
Acid Rain (Tennessee, Kentucky, Virginia)
burning coal, and sulfur dioxide is the specific element
nitrous oxide, comes out of cars
Where is Acid Rain a Problem?
In VA? Yes, its yearly damage amounts to millions of dollars
Why isn’t the pH of rainwater 7? Carbon dioxide, when it interacts it makes it more acidic
What is the pH of “natural” rain?
“Natural” rain water has a pH of about 5-7
Acid rain is below five
Stomach acid 1.5
Sea Water 8.6
How does Acid rain become acidic
Air, naturally, CO2, carbonic acids
Soils, naturally, organic acids (Humic)
Humans: SO2 (sulfuric acid), NOx (nitric acid), CO2 (carbonic acid)
Acid Rain, Who is responsible?
The east coast
Many power companies are using “low sulfur coal” to minimize sulfur emissions (VA!)
Sulfur can also be stripped from the emissions stack
Sulfur dioxide emissions to the atmosphere
Sulfur dioxide emissions in the US peaked in 1973
1970 and 1990 Clean Air Acts led to 38% decrease in emissions in late 1990s
What are the consequences of acid rain?
Many aquatic species and plants cannot survive in acidic waters, at pH 5.5 clams and
snails are gone, six and up everything is ok, at 4 only frogs can survive, at 4.5 only perch
and frogs, and at 5 only trout, perch, frogs, and salamanders….if you see mayflies then
most likely it is healthy water
Should dominion power build another coal burning power plant near Wise, VA?
No, emits lots more CO2 into the air
February 27, 2008
Acid Rain affects trout in Virginia
Acid Rain, Soil, and Rocks
How does rain water get neutralized?
Naturally alkaline soils and rocks (bas),