claim: the ocean is now "much more acidic . . . than it has been for many millions of years."
author: al gore
evidence_1: apr 30, 2018 ... although scientists have been tracking ocean ph for more than 30 years, ...  acidity describes how many h+ ions are in a solution; an acid is a ... an ocean  more acidic than any seen for the past 20 million years or more.
evidence_2: jul 26, 2018 ... ... to become more acidic than they have been in 14 million years. ... your  browser does not currently recognize any of the video formats ... as these  foraminifera grew near the ocean's surface several million years ago, the  chemistry of the ... was 3°c warmer and co2 levels were higher than they are  today.
evidence_3: apr 27, 2017 ... when carbon dioxide dissolves in this ocean, carbonic acid is formed. ... over the  past 300 million years, ocean ph has been slightly basic, averaging about 8.2. ...  oysters, shrimp, lobster, many planktonic organisms, and even some fish species  could .... wolves can go for more than a week without eating.
evidence_4: for more than 200 years, or since the industrial revolution began, the  concentration ... this increase causes the seawater to become more acidic and  causes carbonate ... north of the arctic circle... where very little is known about  how carbon dioxide is. ... over the last decade, there has been much focus in the  ocean science ...
evidence_5: the ph of seawater has remained steady for millions of years. before the  industrial era began, the average ph at the ocean surface was ... we are hurtling  toward an ocean different than the earth has known for more than 25 million  years. ... yet even so many will expend more energy to maintain their optimal acid -base ...