Editing Light pollution (section)

=== North America ===
In North America the situation is comparable. There is a significant problem with light pollution ranging from the Canadian Maritime Provinces to the American Southwest.<ref name="NWA" /> The [[International Dark-Sky Association]] works to designate areas that have high-quality night skies. These areas are supported by communities and organizations that are dedicated to reducing light pollution (e.g. [[Dark-sky preserve]]). The [[National Park Service]] [[Natural Sounds and Night Skies Division]] has measured night sky quality in national park units across the U.S. Sky quality in the U.S. ranges from pristine ([[Capitol Reef National Park]] and [[Big Bend National Park]]) to severely degraded ([[Santa Monica Mountains National Recreation Area]] and [[Biscayne National Park]]).<ref>{{cite journal|author1=Duriscoe D. |author2=Luginbuhl C. |author3=Moore C. |title= Measuring Night Sky Brightness with a Wide-Field CCD Camera|doi=10.1086/512069|arxiv=astro-ph/0702721|bibcode=2007PASP..119..192D|volume=119|issue=852 |journal=Publications of the Astronomical Society of the Pacific|pages=192–213|year=2007 |s2cid=53331822 }}</ref> The National Park Service Night Sky Program monitoring database is available online (2015).<ref>[http://www.nature.nps.gov/night/skymap.cfm Night Sky Monitoring Database] {{Webarchive|url=https://web.archive.org/web/20160713124149/http://www.nature.nps.gov/night/skymap.cfm |date=2016-07-13 }}. nature.nps.gov</ref>