A Travel to Dark Sky Places in the USA 2014

An impressive journey report through the United States: USA2014-Report Andreas Hänel traveled to the darkest sky regions in the Southwest which mostly have gold status of the IDA tiers and he studied how and with which methods these dark skies are protected and promoted. He further compared lighting habits in the US and in European countries, and presents time development of lighting in Las Vegas with changes due to LED lighting in the last years.