To make earth cleaner, greener and safer, which energy sources should humanity rely on?

Alex Epstein of the Center for Industrial Progress explains how modern societies have cleaned up our water, air and streets using the very energy sources you may not have expected–oil, coal and natural gas.

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Alex Epstein

Alex Epstein is a writer for the Ayn Rand Institute (www.aynrand.org) in Irvine, California. Visit his website at www.AlexEpstein.com.