Coal and nuclear cooling towers use a lot of fresh water, they try to reuse it but still between 2 to 3.5 billion gallons a year evaporates from each plant. Japanese nuclear plants don't have this problem for example because they are built on the coast and consume water directly from the ocean instead of using fresh water cooling towers.
It's basically just bikeshedding but for comments. I don't think it's specific to this site. You get the same thing in peer review when you submit a paper to a journal. Those who don't know enough to comment on the main topic comment on other things they do know about.
This is wrong mathematically and I can prove it. Bob has a gas car. Bob is bed ridden and never drives anywhere. 0 miles a year = 0 emissions. So there exists a threshold of miles driven per year below which it's greener to keep the gas car. QED.
