re: #11 Mich-again
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I’m guessing desertification will seem like a minor problem when the alternative is being underwater.
Minor or major would vary by region. In an area such as Bangladesh a rise in sea level would be traumatic, ditto any Island Nations. A developed country like the US may be better able to move larger population, but a loss of farming could be a larger problem.
On the one hand, the wealthier nations are more able to move because of greater resources, on the other hand, they have more to move.