A prominent American earth scientist has concluded that the recent global warming cycle is over. Peter Westmore reports.The Earth passed its global warming peak some years ago and is now in a 30-year cooling phase, a prominent American earth scientist, Emeritus Professor Don Easterbrook, has concluded.Professor Easterbrook’s findings were published by the Center for Research on Globalization, an American research organisation based in California.He said that despite the fact that there had been …