Citizen science study determines that more than one light per person is still on late at night in Germany

Nighttime satellite images have shown that cities are getting brighter, and light pollution is now recognized as an environmental issue. But how should local governments even begin the work of resolving this if nobody really knows what the sources of all this light are? A large citizen science project led by Dr. Christopher Kyba, at the time geographer at Ruhr University Bochum and the GFZ Helmholtz Center for Geosciences, is now shedding light on the matter.