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Data centers raise nearby temperatures by up to 4 degrees in Phoenix
(techxplore.com)
This is a most excellent place for technology news and articles.
Important context to the headline:
So it sounds like a very local effect, that is not measurable more than 1/3 miles from the datacenter. Doubt it will be noticeable at all in a climate as warm as Arizona
"see, it's barely noticeable. let's build like 5,000 more!"
All the same... Name one town that does not need to be any hotter at all!