I think generally "green building" (at least the mainstream stuff) focuses on insulation + air tightness, and then mechanical ventilation. In that context, operable windows would be mostly be a "just in case of overheating" or similar, and the expectation would be CO2 et al would be managed by the ventilation.

Building codes already require operable windows, and some local codes now require active ventilation systems.

The stock of office buildings probably turns over fairly slowly. I've actually never worked in an office where the windows opened.