The article ends by saying our belief of water on the moon has improved from "one part per billion" in 2006, to "one part per million" today, like it's a huge r

The article ends by saying our belief of water on the moon has improved from "one part per billion" in 2006, to "one part per million" today, like it's a huge revolutionary improvement. I know it's 1000x, but its still just one part per million. So it takes a million gallons of moon rocks to extract one gallon of water? If we believe the Russian data then they found one part per thousand. By mass. So a gallon of water would only require you to process three hundred gallons of rock. And the "processing" isn't that difficult: heat it up and collect the vapor. Besides, even if it is parts per million, that ain't bad. According to http://en.wikipedia.org/wiki/Open-pit_mining http://en.wikipedia.org/wiki/Open-pit_mining gold can be economically mined at a couple of ppm, while copper and nickel are mined at parts per thousand.