Summary: http://trailfire.com/3051410/trailview/81923
This website focuses on the greenhouse effect and explains how gases such as carbon dioxide could cause global warming. There are also videos of experts and other people talking about what is happeing with the environment. This page also offers a very good explanation for dramatic climate changes in the history of the Earth. I was impressed by this website in that it uses the word "could" rather than "will". This website was very good at relaying that it is a possiblity not a fact.
This web page discusses how global warming is already starting to kill off some species of animals. It does not matter wheter it is man-made global warming or just the natural cycle of the planet, it is important to remember that we do need to deal with it. This article covers how some more suceptible species such as frogs and insects are already starting to die off due to the warming trend. Other species such as polar bears are also losing their natural habitats. It is important to determine if this is natural selection via the Earth's natural climate cycle or is it man's damage to the Earth?
This is an interesting website because it actually challenges the global warming phenomenon all together. This website lists multiple sources that challenge that global warming is a phenomenon that is actually occuring by questioning data that is presented by global warming "experts". There is certainly a lot of information on this website that does raise eyebrows on a lot of the information that is being thrown out there by politicians and the media. A great example of data is the facts on arctic ice mass, this website agrees that arctic ice is down 7% since 1980, but antarctic ice is up 43% since 1980 which is something we do not hear about in the media. This website lets you think about whether or not the world is really warming or merely adjusting as it has done countless times throughout history.
While it may be true that the world is warming I think that man has little if anything to do with it. That being said global warming does cause serious problems (just as global cooling would). Here's a CNN article that hit the web today regarding the potential devistation we could be facing due to global warming (http://www.cnn.com/2009/WORLD/europe/05/29/annan.climate.change.human/index.html?eref=rss_world)
Think about it this way, in a few thousand years we're all going to be worried about the glaciers advancing from the north again as the next ice age crisis hits. This cyclical climate process our planet goes through is natural; it's the impact on our lives that makes it a crisis.