The book is very sloppy in both content and style. There were paragraphs that I had to read seven or eight times to try and figure out what part of the message the author left out. There are "facts" included in the text that don't even pass the giggle test. It appears there are many key words that are missing, little clues that might indicate a number represents "millions" of tons, and not tons. Of course the correct answer might be "billions", the text offers no clue. The author begins the book by stating that he will be "neutral" on the issue of anthropogenic global warming, and then throughout the book takes every opportunity to link alternative energy to AGW -- focusing on carbon emissions, which he always refers to as "greehouse gases". I love the DUMMIES series, and have well over a dozen in my library. This is the first one that really disappointed me. A decent editor with knowledge of the subject could have fixed it.