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Olduvai III: Catacylsm
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Concrete: the most destructive material on Earth

Concrete: the most destructive material on Earth Preface. Some of the points I found most alarming or interesting: After water, concrete is the most widely used substance on Earth.  Concrete is a thirsty behemoth, sucking up almost a 10th of the world’s industrial water use. This often strains supplies for drinking and irrigation If the […]

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Olduvai IV: Courage
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Olduvai II: Exodus
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