US Geological Survey - Surface Water Information (Look for links that go with your topic!)
Keywords: Light Pollution
FOR BACKGROUND (Do not cite)
Databases and eBooks: Authoritative Content from Respected Sources
Websites : Onus* Is on You to Verify the Content
Onus means responsibility. It's your responsibility to be sure the content is correct. It's a better use of your time to use the library databases, when possible.