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Why do we need to attach a number to it for it to be a valid concern? The ocean is undoubtedly changing in ways that, if allowed to continue, will cause massive ecosystem damage, leading to secondary effects on land, such as increased warming and higher CO2 levels. Why is that not enough to convince anyone who matters to do anything?

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There are lots of things being done, but much more could be done - and for that we need to convince governments, which takes data.

In particular we need to convince governing bodies that action is in their direct and immediate economic interest, which again takes data.

There is plenty of data. We've known this day was coming since the 1970's. Economic interests be damned, we need to do something now to avoid the collapse of civilization.

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