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Title: In modern societies, only 10% of human energy is used to produce food. Post by: Gurjeet on Feb 11, 2017 In modern societies, only 10% of human energy is used to produce food.
Title: Re: In modern societies, only 10% of human energy is used to produce food. Post by: BarryO on Feb 11, 2017 Content hidden
Title: Re: In modern societies, only 10% of human energy is used to produce food. Post by: Gurjeet on Apr 5, 2017 You're an amazing chem teacher, thanks
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