Hypebeast - "The circular design was implemented by Apply themselves: an absolutely curved infrastructure void of straight angled glass with a courtyard situated in its core; cited as both to enhance campus security and internal circulations. The 2.8 million square which it is situated on includes an office and R&D facilities for up to 13,000 employees, a 1,000 seat auditorium, fitness center, research facilities, central plant, and underground parking."
"Perhaps Apple's greatest achievement comes from its environmental endeavors through generating its own electricity via an on-site Central Plant, open green spaces for employee enjoyment, and "to exceed sustainability goals though integrated design and development""