We don't need to give up streetlights to make huge progress. 20 to 50 percent of outdoor lighting is wasted. Just shielding streetlights would go a long way. h

We don't need to give up streetlights to make huge progress. 20 to 50 percent of outdoor lighting is wasted. Just shielding streetlights would go a long way. https://www.nps.gov/subjects/nightskies/sources.htm https://www.nps.gov/subjects/nightskies/sources.htm