Several environmentalists, UK MPs and scientists has called for the resignation of Rajendra Pachauri, chair of the UN’s climate science body.
Dr Pachauri, head of the Intergovernmental Panel on Climate Change (IPCC) has in the past been criticised by climate “sceptics”.
They have claimed that some of his comments had become politicised.
Pressure increased recently when a report recommended that IPCC chairs serve only a single term of office.
Dr Pachauri has yet to comment on the matter.
The IPCC chair is into his second term and several leading scientists and green thinkers contacted by BBC News say he should quit now.
The list includes Tim Yeo, chairman of the all-party Commons Climate and Energy Committee and Mike Hulme a former IPCC lead author.
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