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— Kenneth S. Deffeyes"In a sense, the fossil fuels are a onetime gift that lifted us up from subsistence agriculture and eventually should lead us to a future based on renewable resources."
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Essentially all civilizations that rose to the level of possessing an urban culture had need for two forms of science-related technology, namely, mathematics for land measurements and commerce and astronomy for time-keeping in agriculture and aspects of religious rituals.
— Frederick Seitz
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We have to see today in light of the transition, say, from hunting and gathering to agriculture, and from agriculture to industry, and from industry to post-industry. We're in an epoch transition.
— Grace Lee Boggs
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