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You can see here, from the image, that the greenery and the lanscaping will increase dramatically once the building has completed. From trees to bushes, the entire area will be covered in fields and lush green spaces.
"There's not a straight piece of glass in this building". The shape of the office will be entirely circular, and the glass will have to be specially manufactured to accommodate this.
The building will also have 300,000 square feet of research facilities, and the auditorium where press and analysts come for announcements will be "totally underground". This could be partly due to security, but it does sound ominous -- keeping press literally in the dark, as Apple has done many times before.