Let's see: For their pH 8.2, they have "4 Average global surface ocean pH has already fallen from a pre-industrial value of 8.2 to 8.1, corresponding to

Let's see: For their pH 8.2, they have "4 Average global surface ocean pH has already fallen from a pre-industrial value of 8.2 to 8.1, corresponding to an increase in acidity of about 30%." So, the 8.2 was "average", "surface", and "pre-industrial". Hmm .... Where'd they get that number? How the heck was that known then, i.e., "pre-industrial"? And it was just "surface" which is already suspect. For the 8.1, is that really comparable? That is, measured in the same places, at the same times of year? For the 8.1, was there some recent high sea state for a lot of mixing or a big rain storm with fresh water? We can't just accept those numbers; we need references. In general, for that PDF, we need references. Just due to the lack of references, the PDF gets a grade of F due to failing to meet just common high school term paper writing standards. That PDF is junk. The authors of the PDF are attempting a flim-flam, fraud, scam. That PDF is about money and politics, not science or pH.