Tim Cook did alright by the environment — but AI could upend his climate legacy

As he steps down from his post as Apple CEO today, Tim Cook leaves behind a mostly positive environmental record. As far as billionaire tech moguls and the environment go, Cook will likely be remembered as one of the better ones - certainly far from the worst. But it will become harder for the company to meet the climate goals Cook set in place as Apple tries to catch up in the AI race .