Worker performs maintenance on solar panels at a modern building rooftop in the afternoon
Aerial view of solar panel installation on commercial rooftops in an industrial area during daylight
PC monitors on desk used for checking potential system failures in server room
Technician installs solar panels on rooftop in an industrial area during cloudy afternoon
Workers installing solar panels on a rooftop for renewable energy production
Contractor installed mounted concrete block retaining a walls
During installation of retaining wall, a contractor mounted concrete blocks
During installation of concrete block retaining wall, contractor mounted a blocks
Solar technician inspects solar panels on rooftop during overcast day
Concrete block retaining wall was mounted by a contractor
Engineer working with laptop and studying miniature wind turbine and solar panel
Installation of concrete block retaining walls was performed by a contractor
Construction workers install solar panels on a rooftop at sunset in a new development site
Installation of photovoltaic solar modules on a rooftop for renewable energy generation
In a trench underground, drainage pipes are laid assembled for outflow of rainwater stormwater
Process of assembling underground drainage pipes for outflow of rainwater a stormwater
In underground trench, drainage pipes are laid a assembled to channel rainwater stormwater out of
Trench underground is prepared for laying assembling drainage pipes for outflow of rainwater a
