Utah recently cut the ribbon on its tallest building, a 42-story luxury residence in Salt Lake City called Astra Tower. While that is impressive enough, the building is using color coding on its external lighting to let the public know about air quality conditions, according to Axios.
The colors progress from white to orange, red, and purple as air quality goes from good to bad.
Astra Tower boasts other sustainability features such as LEED Gold energy efficiency, water conservation, and a hospital-grade air filtration system…