I don't know why you are so quick to knock this man's credentials when the original chairman of the IPCC was an Indian railway engineer who wrote dirty books.
Blimey John, I don't know where you are getting your information from? The first chairman of the IPCC was Bert Bolin, a Swedish meterologist.
If you are referring to the 3rd chairman, Rajendra Pachauri, it is true that he started his career with the Indian Railways, and it is also true that he resigned amid some unproven allegations which provoked much media coverage at the time.
The 'dirty book' I presume is the novel he wrote, Return to Almora, which is about the reminiscences of a retired bureaucrat, which contains memories of his sexual experiences. Do you consider all sex to be dirty, or just that which is written about by people the reputation of whom you are seeking to impugn ?
His scientific credentials to my knowledge have never been questioned, and it was during his tenure that the IPCC was awarded the Nobel prize.
