Ground Truth Trekking

Figure 6. Electricity price vs. percent coal use, with externalities

Externalities change the relationship between coal use and electricity price. When these costs are accounted for, there is a significant relationship between greater coal use and higher electricity prices. The blue slanted lines indicate correlations over time for states that changed their percentage coal use. There was a significant relationship between higher coal use and higher total costs in 33 of 34 correlations.

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