abstract advance advanced air alternative alternatives applied apply architecture article articles background backgrounds blue branch branches building buildings business category cell cells change charge charging cheap china chinese clean climate climatic closeup co2 co2emission co2emissions collector collectors commerce commercial companies company competition connection connections consumption control craftsmanship day days design detail details durability durable dutch eco ecological ecology ecosystem electric electrical electricity electrics electronical electronics emission emissions energetic energy energysaving energysavings energysource energysources engineering environment environmental europe european export finance financing fossil fuel fuels future futuristic gas generate generates generating germany global heat high hightech hightechnology holland home homes house houses hydro industrial industries industry innovation innovations innovative invent invention inventions inventive invest investing investment investments isolated isolation item items kilowatt lamp lamps light lights manufacturing milieu modern money moneymaking netherlands neutral object objects oil panel panels photovoltaic placement point pollution power powerful powers private producing product products profit profitable profits promote promoted promoting public purveyor purveyors reflector reflectors residential resource resources retail roof save saving savings science sciences sector sectors sky solar something sophisticated source sources stuff subject subjects sun sunlight sunny sunshine supplier suppliers supply supplying sustainability sustainable system systems tech technics technique techniques technological technology texture textures thing things time warm warming