
For the 3 past class periods, we have been watching the documentary "An Inconvenient Truth". I wasn't sure what I would think about this movie. I had heard that it was just
Al Gore preaching about how we're killing the planet. After watching the movie, I was way wrong. One of the first things discussed in the movie was
Roger Revelle. Revelle was the first person to propose measuring the carbon dioxide levels in the atmosphere. Starting in 1958, he found that as time went on the carbon dioxide levels would rise. One of the things I found most interesting was that the amount of carbon dioxide in the atmosphere depends on the season. This is because in the fall, the trees loose their leaves and absorb less of the carbon dioxide. In the spring, the trees start to get their leaves back and absorb more carbon dioxide.
Another thing Mr. Gore discussed was why the poles are being affected faster than other regions. He explained that the ice caps at the poles act as mirrors. The caps reflect most of the incoming solor radiation and keep the earth cool. As the ocean gets warmer, the caps get smaller and reflect less radiation. This speeds up the melting process. Something I found interesting was that a warmer ocean creates larger storms. I think that this is quite evident with storms like Hurricane Katrina.
The warming of the earth also create even more problems. One thing that has happened from this is structural damage. Some structures that had been constructed on the permafrost are now collapsing because of the melting permafrost. Global warming also causes drought in some areas. Another problem is that the precipitation that is no longer falling in some areas is being relocated to other areas. There was even a place in India that had 37 inches of rain in a 24hour period.
For the people who still don't believe in
global warming, there was a study done in which a sample of 928 peer reviewed journals, and none of them disagree with the FACT that global warming does exsist. When they looked at the public press, they found that about 53% of the articles stated that global warming hasn't been proven.
In my opinion, I think that everyone should see this documentary. It has truley opened my eyes.