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 <a href="http://www.foe.org/textbook/Hansen_Letter.pdf">http://www.foe.org/textbook/Hansen_Letter.pdf</a> and Dr. MacCracken's letter at <a href="http://www.foe.org/textbook/MacCracken_Letter.pdf.It">http://www.foe.org/textbook/MacCracken_Letter.pdf.It</a> is hard enough to persuade l