Hawaii governor Linda Lingle signed a bill into law June 26 that requires the installation of solar water heating systems in homes starting in 2010.

Hawaii governor Linda Lingle signed a bill into law June 26 that requires the installation of solar water heating systems in homes starting in 2010. The new law prohibits issuing building permits for single-family homes that do not have solar water heaters.

State Sen. Gary Hooser (D-Kauai-Niihau) first introduced the measure five years ago when he said a barrel of oil cost just $40. Since then, the cost of oil has more than tripled.

Hooser stated both the environment and the economy would benefit. “I’m hoping this will start a trend nationwide,” he told the Associated Press.