Barcelona pioneered renewables obligations for solar energy in Europe. In August 2000, the city in the Spanish Catalonia region adopted solar building regulations that required a predefined share of solar-heated […]
Ten years after Hawaii’s Solar Hot Water Mandate was issued the Hawaii Solar Energy Association won a lawsuit to weed out a fatal flaw of the regulation that required all […]
Every fifth building permit for new single-family houses in Hawaii included a tankless gas water heater in the first half of 2010. This is a rather large share, if considered […]