New York Times: California officials adopted the country’s first mandatory statewide green building code on Tuesday. The regulations, called Calgreen, will help the state meet its goal of trimming greenhouse gas emissions by 33 percent by 2020. Beginning next January, every new building in the state will have to reduce water usage by 20 percent and recycle 50 percent of its construction waste instead of sending it to landfills. Commercial buildings will be required to have separate water …