What will it mean? Ask your local lake! – Four degrees Celsius is the equivalent of 7.2degrees Fahrenheit, and this is the amount that the earth is projected to warm up in the future. It seems like a small change, but it could have major repercussions.

In New Scientist, Gaia Vince writes: “Alligators basking offthe English coast; a vast Brazilian desert; the mythical lostcities of Saigon, New Orleans, Venice and Mumbai; and 90% of humanity vanished. Welcome to the world warmed by 4

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