Cause for Global Warming/Hole in Ozone Layer
What are some casuses for global warning?
Pam, such a seemingly simple questions require unfortunately
elaborate answers. Since you have asked two questions, I will split my answer
into two sections: *** What is causing global warming and what can we do to
stop it? Well, first of all, it is not exactly clear if there is indeed global
warming at all. The phenomenon of global warming was discovered when data from
various weather stations was compared from year to year. There seemed to be a
trend of increasing temperatures at most of the data collection points. This
indicated that the planet was warming at an alarming rate.
If you think about
it, a rise in temperature of a few degrees or so at 50 or 100 points on the
earth does not mean that the earth is getting hotter. It means that the data
points are getting hotter. Most of the original data was collected in the
forties and fifties at locations in or adjacent to urban areas. As time went
on the areas of data collection became more urbanized. Logically, more people
and buildings produce more heat. Data collection at remote sites that did not
become urbanized did not indicate any warming at all. However, when all the
data was averaged, a very frightening picture emerged. The planet seemed
doomed. Because of the uncertainty of the original data (due to changes in
population at the data collection points), many new weather stations were set
up and an international committee was established to study global warming.
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Update: June 2012