Following up yesterday's post I looked at the study that provided the background for the paper studied there:Jeffrey Y. Tsao and Paul Waide:"The World’s Appetite for Light: Empirical Data and Trends Spanning Three Centuries and Six Continents"LEUKOS VOL 6 NO 4 APRIL 2010 PAGES 259 – 281This paper gives a figure of per capita light consumption and GDP/cost of light:I drew the thick black line on
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