makayla is giving her presentation.
because of global warming the ice is breaking. polar bears can swim but because
the distance is soo long, they sometimes drown.
Facts:
polar bear is one of the top predators on the food chain. high levels of toxins are stored in the blubber of the prey. so they can get diseases.
coral
total area of ocean reefs comprise .2%
"underwater gardens"
11% has already been damaged.
60% has beeen threatned by human activities.
great barrier reef is the largest reef, by austrailia 2000 km long
98% is protected.
33% was zoned out. meaning you cant take it home,
it is still at risk from increaing water temps as a result of global warming.
bleached are white coral
non bleached is normal- all colorful.
bleaching incedints have happened twice, 1998 and in 2002.
1998-42% of the shallow water reef is bleached
in 2002 55% was bleached and 5% died.
global warming is also likely to increase the levels of carbon dioxide in the ocean.
coral grows really slow.
now were moving onto blog discussions from last week.
nuclear from 1970 they updated the treaty.added to it. the treaty is that places cant tranfer nuclear stuff to other countries that dont have it.
1974 they had the bomb treaty. signed by the soviet union and the united states. reduced the size of test bombs. went below ground to test weapons, but then they changed it so you cant test at all pretty much, cant test in space either.
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