You need to lookup how much an "average" human consumes. When I replace 2 humans with a ChatGPT subscription, I can guarantee you that OpenAI is generating less co2 than what these two interns were creating with their transport to the office (and back). That's before we consider things like the 25 years it took to raise and train them or the very expensive tastes (eg. Travelling around the world) they get after they earn a large salary.