Inquiry from Russia: pitfalls of practice of policy advising

I got this inquiry from Russia: "I found some titles of your interesting publications, but they are not available in our local libraries, which do not subscribe foreign editions. If possible, please, explain me what are the main pitfalls in the present practice of policy advice concerning man-made climate change in your opinion? What are the main causes of discrepancy between scientific knowledge about climate change and its understanding in the public?" Here is my answer, to which I invite comments by the readers of Klimazwiebel (please stick to the issue in your comments!)