Home to Hollywood, fame and fashion, Los Angeles nurtures a culture of cool. But as the sun beats down on L.A., the city’s countless rooftops also emit oven-like heat. A law taking effect Oct. 1 seeks to change that. Under changes to the Los Angeles Green Building code, new homes in the city — including rentals —  must have so-called “cool roofs.” Los Angeles is the first major city with this requirement. These roofs use materials that reflect sunlight, helping buildings be more than 50 degrees cooler on the surface. During a hot day, the roofing can lower a building’s… Read More