"Failure to correct the book's errors will leave students gravely misinformed about the facts and science of global warming, one of the most serious problems that we as a society and a species face.You can read Dr. Hansen's entire letter at http://www.foe.org/textbook/Hansen_Letter.pdf and Dr. MacCracken's letter at http://www.foe.org/textbook/MacCracken_Letter.pdf.It is hard enough to persuade l" . . . .