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Lecture 11

EESA10 Lecture 11


Department
Environmental Science
Course Code
EESA10H3
Professor
Jovan Stefanovic
Lecture
11

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EESA10 LECTURE: Global Climate Change and Human Health
-climate is warming up and there are reasons of why and how it happen
-no debate between scientists and public, used to be a question, now we are more convinced
that climate is changing and this isnt an unusual thing, it is normal
-there are period of glaciations when everything was covered with ice and between the
glaciations period there is a period called interglacial period
-we live in interglacial period
-end of the last ice age around 10 000 years ago
-therefore question is not that its happening, it is that is it happening faster than before?
And what role do humans play in this?
-greenhouse effect keeps planet alive and warm
-energy from the sun warms the Earths surface and some energy radiates back towards
space
-water vapour (clouds), carbon dioxide, and other gases are heated
-most important green house gases are water vapour, carbon dioxide, methane, and
dinitrogen oxide
-all data shows that from the beginning of century, concentration of all greenhouse gases
have increased
-on second graph, that concentration of greenhouse gases is directly proportional to the
temperature
-there are other sources than natural carbon dioxide
-any kind of manure contributes to green house gases
-in production of rice there are two phases, one wet and one dry, during transition of these
phases a lot of greenhouse gases are released
-some inorganic fertilizers are sources of nitrogen
-many examples of climate change shown in present problems
-some believe that global warming is good, especially for the northern countries but this is
not true
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