American cities are many times brighter at night than German counterparts

[tamim_saif]

German cities emit several times less light per capita than comparably sized American cities, according to recent research. The size of the gap grew with city size, as light per capita increased with city size in the USA but decreased with city size in Germany. The study also examined regional differences, and surprisingly found that light emission per capita was higher in cities in the former East of Germany than from those in the former West.

source: internet

[smriti.te]

interesting