• [2013-07-31] Cleaning solar panels often not worth the cost, engineers at UC San Diego find
  + http://ucsdnews.ucsd.edu/pressrelease/cleaning_solar_panels_often_not_worth_the_cost_engineers_at_uc_san_diego_fi + http://www.sciencedirect.com/science/article/pii/S0038092X13002582
  in Tietoukka Monitor > 2013 > 2013-31 with maintenance solar_panels
• [2013-08-02] New coating turns ordinary glass into super glass
  + http://www.sciencedaily.com/releases/2013/08/130804081123.htm + http://wyss.harvard.edu/viewpressrelease/120 + http://www.nature.com/ncomms/2013/130731/ncomms3176/full/ncomms3176.html
  in Tietoukka Monitor > 2013 > 2013-31 with solar_panels

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