View the graph in the website at http://www.antarcticglaciers.org/glaciers-and-climate/ice-cores/ice-core-basics/ (Links to an external site.)  , the current CO2 concentration at http://keelingcurve.ucsd.edu (Links to an external site.), and the carbon cycle at http://earthobservatory.nasa.gov/Features/CarbonCycle/ (Links to an external site.)  Also, read the section on climate change in Chapter 11 of your textbook.

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

Your paper should meet the following requirements:

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