Opponents of action on global warming have seized upon Sir Partha's sally against Sir Nicholas.

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The high value of eta that Sir Partha advocates may not match that chosen by the Stern review.

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Partha Chatterjee, the portly leader of opposition in West Bengal, says the party's focus will be on information technology and services.

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But Prof Partha Mitra, a neuroscientist at Cold Spring Harbor Laboratory, New York state, says we need to be aware of the limitations of the technology in use.

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If Sir Nicholas is such a staunch egalitarian between the future and the past, Sir Partha complains, he should be more egalitarian between the rich and the poor.

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These shots at the Stern report whistle in from different directions, but Mr Nordhaus and Sir Partha both agree on one point: Sir Nicholas's choices are inconsistent with each other.

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Sir Partha thinks this gives the poor short shrift.

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Lord Rees, along with Cambridge philosopher Huw Price and economist Sir Partha Dasgupta and Skype founder Jaan Tallinn, wants the proposed Centre for the Study of Existential Risk to evaluate such threats.

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But Sir Partha himself supports such efforts.

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