And The ocEAN

Plurality should not be posited without necessity.

—Occam's Razor (attributed to William of Ockham)

IN THIS FINAL CHAPTER WE DISCUSS A TOPIC OF GREAT

current and likely future interest, namely global warming. In the first half of the chapter, we talk about warming quite generally: what it is, what the evidence is for it, what the consequences might be, and what the level of uncertainty might be about future warming. In the second half of the chapter, we concentrate on the role and effects of and on the ocean. We find that the evidence unambiguously points to a single culprit for global warming, namely the increasing concentration of greenhouse gases in the atmosphere. Although it is possible that we could, with some effort, come up with other explanations that would fit the facts, we would need to invoke several different explanations to fit all the facts and/or invoke rather implausible ones.

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