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California retained its #1 ranking for the fourth year in a row, outpacing all other states in its level of investment in energy efficiency across all sectors of its economy.
The balance of the top 10 states:
The four most-improved states - Utah (tied for #12, up 11 spots from 2009), Arizona (#18, up 11 spots), New Mexico (#22, up eight spots), and Alaska (#37, up eight spots). In general, the Southwest region demonstrated considerable progress from 2009 to 2010.
The full report is available online at www.aceee.org/research-report/e107