Lack of Citations
Unfortunately it lacks authority. There are no citations and all we get are phrases such as "scientists are becoming concerned", people believe" and so on. What people think or believe is not important, what matters is empirical research and this author refers to none. It consists entirely of largely unattributed opinion. Every word of it may be true, but it could equally be a collection of imaginative musings. This book was given to me as essential information, but my scientific opinion is that it is superficially interesting but of little use.