We 've got a $ 12 trillion capital investment in the world energy economy and a turnover time of 30 to 40 years , '' said John P. Holdren , a physicist and climate expert at Harvard University and president of the American Association for the Advancement of Science . ''
John P. Holdren /business/person/company Harvard University
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John P. Holdren
PERSON
Harvard University
ORGANIZATION
/business/person/company