Atmosphere and Clouds

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, answer the following questions:

What is the current CO2 concentration in parts per million (ppm)?
Is this higher or lower than the highs over the past 450,000 years?
From what three sources do humans add CO2 to the atmosphere?
What two sources take CO2 out of the atmosphere?
How does deforestation contribute to the global warming process?
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.)

Be sure your paper is 2-3 pages long, cites credible sources, answers all questions with complete sentences and paragraphs, and your paper must include a title page, be double spaced, and have 1-inch margins.

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