| gptkbp:instanceOf | gptkb:person 
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                                | gptkbp:almaMater | gptkb:Harvard_University gptkb:Stanford_University
 
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                                | gptkbp:awardReceived | gptkb:Rachel_Carson_Award gptkb:National_Jefferson_Awards_for_Public_Service
 
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                                | gptkbp:boardMemberOf | gptkb:Earth_Day_Network gptkb:American_Solar_Energy_Society
 gptkb:Worldwatch_Institute
 
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                                | gptkbp:dateOfBirth | 1944-08-29 
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                                | gptkbp:employer | gptkb:Bullitt_Foundation 
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                                | gptkbp:fieldOfWork | environmentalism renewable energy
 sustainability
 
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                                | gptkbp:knownFor | gptkb:environmentalist coordinating the first Earth Day
 
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                                | gptkbp:nationality | gptkb:American 
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                                | gptkbp:notableWork | gptkb:Cowed:_The_Hidden_Impact_of_93_Million_Cows_on_America’s_Health,_Economy,_Politics,_Culture,_and_Environment gptkb:Rays_of_Hope:_The_Transition_to_a_Post-Petroleum_World
 
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                                | gptkbp:occupation | gptkb:environmentalist gptkb:author
 
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                                | gptkbp:placeOfBirth | gptkb:Wisconsin,_United_States 
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                                | gptkbp:positionHeld | President of the Bullitt Foundation 
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                                | gptkbp:spouse | gptkb:Gail_Boyer_Hayes 
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                                | gptkbp:bfsParent | gptkb:environmental_movement_of_the_1960s_and_1970s gptkb:Earth_Day_Network
 
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                                | gptkbp:bfsLayer | 6 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Denis Hayes 
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