Here is an excerpt from an article explaining some of the reactions to the testimony of Dr James Hanson the eminent Earth Scientist before Congress in 1988 testifying of the dangers and trends already present with regards to AGW. "The smears and propaganda began almost immediately from contrarians such as Patrick Michaels and a snake-oil salesman named S. Fred Singer. Eventually, it became known that both men (and others) were part of a well-financed campaign on the part of fossil-fuel companies to persuade Americans (and politicians) that global warming was a hoax and that Hansen and other scientists sounding the alarm were fools or worse."
Here is the the printed version which Hansen used to testify. It is 24 pages long in PDF format. http://pubs.giss.nasa.gov/docs/1988/198 ... etal_1.pdf