CO2 Paper

View the graph in the website at http://www.planetseed.com/sciencearticle/global-climate-change-and-energy and the current CO2 concentration at http://keelingcurve.ucsd.edu

Compare current CO2 levels to the highest concentrations from the past 450,000 years. Based on these websites, and the textbook, answer the following questions:

1. What is the current CO2 concentration in parts per million (ppm)?
2. Is this higher or lower than the highs over the past 450,000 years?
3. From what three sources do humans add CO2 to the atmosphere?
4. What two sources take CO2 out of the atmosphere?
5. How does deforestation contribute to the global warming process?
6. In your opinion, are humans contributing to global warming, or is it just a natural part of the cycle? Defend your answer to question #6. (There is no right or wrong response to this last question; you will be judged on how well you present your argument.)