Going back a good one hundred years, early filmmakers had a lot of trouble controlling lighting, largely because the movies were shot outside, so there would be times in the day, such as around noon, when it would be very bright outside. But then by three or four in the afternoon the sun would go down affecting the lighting of the film.
What began as a part-time custodial job while attending college, has matured into a lifelong vocation for Matthew Dunbar, Manager of Custodial and Grounds for the Cedar Rapids Community School District, (CRCSD). In this role, Dunbar directs custodian janitor operations for the second largest school district in Iowa; overseeing one hundred-fifteen building engineers and custodians spread out amongst thirty-three facilities.
About six years ago, the professional cleaning industry was introduced to automatic scrubbers that could clean and maintain floors by electrically converting regular tap water into a cleaning agent. While there was certainly some controversy about these systems when they were first introduced—mainly revolving around claims about their cleaning effectiveness— these days chemical-free floor machines appear to be quite popular and are now used around the world.