By 2040, the Sahara will be moving into Europe, and Berlin will be as hot as Baghdad. Atlanta will end up a kudzu jungle. Phoenix will become uninhabitable, as will parts of Beijing (desert), Miami (rising seas) and London (floods). Food shortages will drive millions of people north, raising political tensions.
~ James Lovelock (born: 1919-07-26 age: 90) article Lovelock is more pessimistic than the consensus, because he thinks man will refuse to take significant action to ameliorate global warming.