About that idea that diseases are marching across a warmed world…

It’s become one of the accepted items on the tote board of reasons not to warm the Earth up: diseases are moving poleward as temperature rises. In the Globe today, staff writer John Donnelly reports from a debate at the National Academies of Sciences’ Institute of Medicine. One speaker said the data aren’t there. Another, a well-known Harvard man convinced of the case, said sure they are.

It’s a good intro vignette on a specific issue and includes context from the turmoil in Washington among lawmakers and their expert witnesses over a raft of climate-related legislation.

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