    Sentence. t What wes Martin Parry's role in ‘the  IPCC?    Sentence Z Martin Parry, a climate expert who  had been co-chair of the IPCC working. group IL  said that "What began with a-single unfortunate  erfor’ over Himalayan glaciers has, become a  clamour without Substance” and the IPCC had  investigated the other alleged mistakes, which were  “generally unfounded and also marginal to the  assessment’: