Question

Which passage from the Article best supports the idea that the invention of AC has also had a negative impact?

Large buildings and hospitals were the first to use [air conditioning].
These new arrivals needed places to work…. All of these businesses relied on computers.
Houses no longer needed those expensive high ceilings, airy windows, and front porches.
That electricity [used by AC units] relies primarily on burning fossil fuels..., which is a significant contributor to climate change.

Answer 1

"That electricity [used by AC units] relies primarily on burning fossil fuels..., which is a significant contributor to climate change."

This passage directly states a harmful environmental consequence of air conditioning.