Telegraph: Dr Rajendra Pachauri, the head of the Intergovernmental Panel on Climate Change (IPCC), said the assertion in its 2007 report had “cost us dear’ in the fight against global warming and helped boost the efforts of sceptics. Despite the IPCC previously admitting it had made a mistake in its assessment on climate change, Dr Pachauri refused to personally apologise for the error because he was not responsible for that part of the report. In an interview published on Wednesday, the …