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shubu
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Homework Statement
Question: If petroleum used in transportation were replaced by electricity generated by coal, what would be the percentage change in carbon dioxide output?
Refer to the following diagrams for values:
- https://flowcharts.llnl.gov/content/carbon/carbon_emissions_2012/2012_US_Carbon.png
- https://flowcharts.llnl.gov/content/energy/energy_archive/energy_flow_2012/2012new2012newUSEnergy.png
- Petroleum has an efficiency rating of 1/4 in transportation.
- Coal that is burned to produce electricity has 1/3 efficiency.
- Petroleum has 2/3 the carbon footprint of coal.
- Switching to coal means: using less of a fuel; fuel has higher carbon footprint.
Homework Equations
[itex]Percentage \ change = \frac{Initial - Final}{|Initial|}[/itex]
The Attempt at a Solution
[itex]Percentage \ change = \frac{1170 - 1180}{|1170|} \\[/itex]
[itex]Percentage \ change = -0.56\%[/itex]