[Mojave]

“Note also the claim that pH has changed by 0.1 units over the last 200 years: it was not possible a hundred years ago, never mind 200 years ago, to measure pH to the accuracy necessary to support that assertion, so it’s just posturing.”

http://ilovecarbondioxide.com/2009/04/here-comes-ocean-acidification-scam.html

[neverdem]

“Note also the claim that pH has changed by 0.1 units over the last 200 years: it was not possible a hundred years ago, never mind 200 years ago, to measure pH to the accuracy necessary to support that assertion, so it’s just posturing.”

Acid-Base Theories

The oldest is from 1883. I have to wonder when they decided to express acidity in terms of pH?

Thanks for the link, but it's a weird URL. One that wouldn't let me go back to this thread. I had to close the window.