A study found that waste heat generated by a city’s worth of air conditioners during a heatwave can raise the outside temperature by more than 2 degrees Celsius.
Sure, individually. But in cities you’ve got tens of hundreds of thousands of buildings, if not millions, doing the exact same thing. Combine that with all the heat absorbed from asphalt, concrete, etc. We’ve known for a long time that cities are usually a few degrees F hotter than the surrounding area.
I always figured it was a flea’s fart compared to the whole outside
Sure, individually. But in cities you’ve got tens of hundreds of thousands of buildings, if not millions, doing the exact same thing. Combine that with all the heat absorbed from asphalt, concrete, etc. We’ve known for a long time that cities are usually a few degrees F hotter than the surrounding area.