2.4.1: Sankey Diagram Questions

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Please refer to the Sankey diagrams for Washingto and Pennsylvania to answer the knowledge check questions. For consistency, the 2012 Sankey diagram for the U.S. is also provided for comparison.

Sankey diagra for the United States for 2012 — 2012 Sankey diagram for Washington State

2012 Lawerence Livermore National Laborator

Washington State Sankey diagram — 2012 Sankey diagram for Washington State

2012 Lawerence Livermore National Laboratory

Pennsylvania State Sankey diagram for 2012 — 2012 Sankey diagram for Pennsylvania state

2012 Lawerence Livermore National Laborator

Check Your Understanding

Q1: Compared to Washington State, is Pennsylvania’s energy mix more or less similar to the energy mix of the U.S. as a whole?

Answer: Compared to the U.S. as a whole, Pennsylvania is very similar. Like the U.S. as a whole, Pennsylvania relies primarily on a mix of fossil fuels (natural gas and coal) and nuclear energy for electric power generation and oil for transportation. Washington on the other hand relies principally on hydropower for electricity generation.

Q2: Identify the biggest source of energy used in electricity production in Pennsylvania, Washington and the US as a whole?

Answer: In Washington the biggest energy source for electricity production is hydro power. In Pennsylvania and the US as a whole, it is coal.

Q3: Is a greater proportion of total energy wasted in Washington or Pennsylvania? How do these states compare to the U.S. as a whole?

Answer: In Washington about 2/3 of all energy is wasted. In Pennsylvania the percentage is very slightly smaller (65% versus two-thirds). In the U.S. as a whole the percentage of energy wasted is around 61%.