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Situated to the south of the famously polluted Los Angeles , Irvine is a master-planned city in Orange County with a population of over 277,000 people . Built in the 1960s by the Irvine Company , the town is home to several large corporations and universities , including the prestigious UC Irvine . In 2018 , the college was recognized as the nation ’ s number one sustainable campus by the Sierra Club , with the most energy-efficient campus and over 90 % efficiency with regard to water usage . SEPTEMBER 2019