It does seem a bit hypocritical the poster's part if we assume he used the worst possible energy source. AC is a comfort and luxury. If we assume that climate apocalypse is impending, then going without a few comforts would seem reasonable.

>there's no political will or consensus to combat climate change; it's also not a one nation issue.

Think about this in the context of the warmist's proposals for limiting energy consumption in the developing world. People who've never had access to AC at home will be priced out of the market due to rising energy costs. Those who have no electricity will have to wait longer or perhaps never enjoy electric lighting.