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What's wrong with the atmosphere?

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joh leones

on 1 February 2015

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Transcript of What's wrong with the atmosphere?

What's wrong with the atmosphere?
Ozone Depletion
-ground ozone is a pollutant, much different than that in the atmosphere
-nitrogen oxide reacts with the ozone molecules to form nitrogen dioxide and oxygen

Ozone Depletion
-Nitrogen dioxide reacts with free oxygen atoms to form nitrogen oxide, which reacts to another ozone molecule
-Ozone layer is continually damaged as nitrogen oxides break down and reform in the atmosphere
Aerosol Cans
Ozone Layer Hole over the Antarctic
Plastic Foams
The Earth's atmosphere is in danger! We need to do something to help our Mother Earth!
Photochemical Smog
- gray-brown haze that hovers over many cities
- especially a problem in warm regions where lots of cars burn gasoline
-involves blending of 3 substances: oxides of nitrogen, hydrocarbons, and solar energy
- this forms ozone
Smog in China
Natural Greenhouse Effect
-occurs when greenhouse gases such as water vapor and carbon dioxide trap some of the heat in the lower part of Earth's atmosphere
-without it, the average surface temperature will be about 34 degrees Celsius colder than it is today
Enhanced Greenhouse Effect
-human activities increase amount of some greenhouse gases especially carbon dioxide
-Carbon dioxide absorbs radiation from the sun and warms the air
- more greenhouse gases in the atmosphere means higher average global temperature
Hole in the Ozone Layer
In 1985, the British Antarctic Survey Team confirmed t there was a hole in the ozone layer over the Antarctic, a hole as wide as the US and as deep as Mount Everest. The identified cause of this are chlorofluorocarbons (CFCs) which are found in aerosols,astic foams, and solvents that clean computer circuits.
- a molecule made up of three oxygen atoms
- occurs naturally in the air, but higher amounts can induce respiratory problems, including damage to the lining of the lungs
Effects of Climate Change
-was the cause of the Ice Age
-organisms cannot easily adapt to abrupt changes in the climate
-ecological communities may be destroyed
-many species may become extinct
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