alternative alternative energy sources alternatives architecture belongings benefit bioenergy build building building exterior building facade building facades buildings business business man business men business people business person business persons business world businessman businessmen businesspeople businessperson businesspersons cash clean technologies clean technology color color image colour colour image commerce commitment concept concept image concepts conceptual conceptual image conservation conserving consider considering construct constructing contemplate contemplating contemplation corporate dedicated dedication deliberate deliberating devotion drawing drawings dwelling dwellings dynamic eager eagerness earning earnings eco friendly eco-friendly ecofriendly ecological ecology economic economy edifice edifices efficiency efficient efficiently energetic energy energy conservation energy efficiency energy industry energy saving energy savings enterprise environment environment engineering environmental environmental awareness environmental conservation environmental engineering environmental issue environmental issues environmental protection environmental technologies environmental technology environmentalism environmentally friendly exterior facade facades filled finance finances financial front fronts fuel and power fuel and power generation gain gains gaze gazing graphic graphic art graphic design green energy green living green technologies green technology high rise high rises high-rise high-rise building high-rise buildings high-rises highrise highrises home homes house houses housing human human being human beings humans idea ideas illustration image images invest investing investment investments location shot lodging lodgings looking male male adult male adults males man men money natural resources nature conservation nature protection option options outdoor outdoor shot outdoors outside ownership people person persons photovoltaic cell photovoltaic cells photovoltaic plant photovoltaic plants photovoltaic system photovoltaic systems photovoltaics picture pictures ponder pondering portrait format possess possessing possession possessions power preoccupied productive productivity profit profits property real estate reflection reflective reflectiveness reflexion renewable energies renewable energy renewable energy source renewable energy sources renewable resource renewable resources renewables residence residences residential house residential houses responsibility responsible roof roof top roof tops roofs rooftop rooftops save energy see seeing solar solar cell solar cells solar collector solar collectors solar energy solar installation solar panel solar panels solar plant solar plants solar power solar system solar systems stand standing striving stuffed sustainability sustainable system think thinking thoughtfulness three three people three persons vertical view viewing vigor vigour visual art wind energy wind power wind power plant wind power plants wind turbine wind turbines windmill windmills wonder wondering 3