"Hawaii is first to mandate solar.
The last state to join the Union, (did you know Hawaii wasn't a star on the flag until 1959?) is the first to mandate solar water heaters on all new construction, and sends a strong message to the land-locked rest of us to catch-up or miss the big wave. The law goes into effect in 2010, giving builders, buyers, and designers plenty of time to coordinate the fine details."
Link: Andrew & Stacy: The Green Team -- Surf's up! Hawaii is first to mandate solar. (HGTVPro.com)