3) Place the number of pennies that equals the amount of CO2 released into the atmosphere by the transportation stage on the truck. How many pennies did you place on the truck? ______
Could you place one whole penny on the truck? _____ Notice the circle below the truck. Color in the amount of the circle to represent the portion of the circle that would represent 0.5g of CO2 released into the atmosphere.

4) Place the number of pennies that equals the amount of CO2 released into the atmosphere due to the power plant construction and maintenance stage of the process. Again note that there is a fractional portion. Color in the amount of the circle that would equal the fractional portion of CO2 released into the atmosphere.

5) When the willow biomass is burned for fuel, 95g of CO2 that was originally taken up by the willow is released into the atmosphere. This represents _________ percent of the original 100g?

6) How much total CO2 is released into the atmosphere in the production, transportation, power plant construction, and the burning of the willow biomass for fuel? (use a percentage)_________________? Using this number, fill in the box at the top of your diagram in the cloud picture.

7) Scatter pencil or pen dots around the top of the diagram to indicate carbon being released into the atmosphere in the form of CO2 from the burning of the willow biomass for fuel.

Thought questions:
a) How much of the CO2, that is released to the atmosphere through the burning of the willow for fuel, is taken up by the growing of the shrub trees? _______________________________________________
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b) In the process from growing to using willow as a fuel source, which is the biggest source of CO2 to the atmosphere? (willow biomass production, transportation, or power plant construction and maintenance) Why do you think this is the case?
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c) Explain why willow biomass crops are referred to as a closed loop cycle fuel?
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d) How does growing willow to be used as an energy source effect the CO2 levels in the atmosphere?
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e) How will using willow biomass as a fuel affect the global warming issues? ____________________________________________________
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