Just out of curiousity......why is everyone so polarized on this issue? Wouldn't it be reasonable to assume that the changes in climate are caused by both naturally occuring cycles and the effects of greenhouse gasses we put into the atmosphere?
That is exactly what is happening. The difference is that naturally occurring cycles happen very slowly in geologic time, while anthropogenic global warming is happening very quickly.
I'm somewhat ignorant on this subject. What are the projected impacts of anthropogenic global warming? (really just asking for a source to read up on) What kind of timeline are we dealing with before the earth becomes uninhabitable, if we continue on our current path?
Get a wide range of opinions and be sure to check the sources. There are a lot of blog sites that simply lie about AGW and offer no scientific basis for their claims. The best ones will cite the sources and those sources will be peer-reviewed scientific journals, not popular articles which are all over the map in terms of accuracy and reliability. Climate Change | U.S. EPA IPCC - Intergovernmental Panel on Climate Change Climate Change: Vital Signs of the Planet - NASA Global Warming -- National Geographic This is a complex calculation dependent on much data we cannot know, such as how fast humans can adapt to changing conditions. Warming is happening too fast for us to adapt by evolution, so it will have to be a technological adaptation and possibly too expensive to consider. But studies indicate that vast portions of the planet could be uninhabitable in 300 years. Earth may be too hot for humans by 2300: study - Environment - The Independent