And also, it takes forever to boil water at high altitude, for a variety of reasons. The air is usually colder (which means the candle consumes more of its fuel

And also, it takes forever to boil water at high altitude, for a variety of reasons. The air is usually colder (which means the candle consumes more of its fuel just warming itself up), the oxygen content of the air makes the candles less efficient, and also less oxygen means the candle burns slow enough that radiative cooling of the water becomes a factor, not to mention that while air is generally a poor thermal conductor, low density air is an even worse conductor. I can boil a quart of water in about 5 minutes on my jetboil at sea level, but it takes about 15 minutes at 10,000 feet. I feel like a point-by-point takedown of this article would get tedious, but it would be a good illustration of how smugly wrong this guy is.