On Monday, the Arizona Corporation Commission voted 3-1 to proceed with a plan to require Arizona utilities to procure 15% of their electricity from renewable resources by 2025. A couple of things to note:

1. 30% of the required renewable energy must come from distributed generation resources — that is, energy generated on the customer side of the meter. This could provide support for up to 2,000 MW of solar, which is more, on a per-capita basis, then California’s groundbreaking $3.2 billion, 3,000 MW solar initiative passed earlier this year.

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2. The commissioners are all Republican.

There are still several procedural steps to get through before the proposed rule becomes final, but this was a significant hurdle. I’ve said it before and I will say it again: The most significant leadership on renewable energy and global warming issues is coming from the states, not the feds.

Press here and here.