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Interesting article in today's New York Time, As Earth Warms, Virus From Tropics Moves to Italy, describing an outbreak of chikungunya in an Italian village.

This is notable as it is the first outbreak of this mosquito-carried disease in Europe. Normally it is confined to the tropics.

A lot of talk about global warming revolves around hot summers and melting ice caps, but for me the real evidence of a true effect are biological system changes such as this. Habitat changes are the most finely tuned and sensitive 'canaries in the coal mine' extant, and this one is singing loudly.