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Olduvai III: Catacylsm
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How Has the US Fracking Boom Affected Air Pollution in Shale Areas?

How Has the US Fracking Boom Affected Air Pollution in Shale Areas? Urban air pollution in the U.S. has been decreasing near continuously since the 1970s. Federal regulations, notably the Clean Air Act passed by President Nixon, to reduce toxic air pollutants such as benzene, a hydrocarbon, and ozone, a strong oxidant, effectively lowered their abundance […]

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Olduvai IV: Courage
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Olduvai II: Exodus
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