We (humanity worldwide) need to reduce greenhouse gas emissions by 99.9%.

Of the two, use of air con in the US is a bigger source than current data centres, and in the middle of the range of extimates for how many new data centres will actually get built over the next few years.

It would of course be much better if both AC and DC (in both senses) were powered by renewables, but y'all elected someone who thinks they're a woke Chinese scam or something, possibly because one got built near a golf course in one of his foreign properties, possibly as a favour to the people who gave him that new aircraft for his "library".