"The weaker and slower the response to the climate challenge, the greater the risk of oil scarcity and the economic cost for consuming countries," the Financial Times quoted a draft of the 2010 World Energy Outlook (WEO) as saying.

The report by the IEA, which advises 28 developed countries on energy issues, is due for release on 9 November.

The inflation-adjusted price of oil would be $113 by 2035 in the WEO scenario that takes into account new environmental policies, versus $135 in the main scenario, with demand at 99 million barrels per day and 107 million bpd respectively.

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