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Business model cleaning of pv systems on private and public roofs contaminated by dust and moss
PV against clear sky alternative energy array blue sky cleaned cleaning climate change close-up day detached house dirty domestic dust energy environment fuel and power generation grid pattern group of people house lunar module moss mounted no people order outdoors pollution power private private housing real estate residential residential building roof roof tile rooftop solar solar energy solar modules solar panel solar panels system — in Darmstadt, Germany