Tucson, AZ is another place that has rules to guard against light pollution. This is to keep skies dark for the nearby observatories. https://en.wikipedia.org/

Tucson, AZ is another place that has rules to guard against light pollution. This is to keep skies dark for the nearby observatories. https://en.wikipedia.org/wiki/Tucson,_Arizona#Light_pollution https://en.wikipedia.org/wiki/Tucson,_Arizona#Light_pollutio...