As a faith-based creed, populism always tended to corrode respect for elite achievement, individualism, urban life, secularism, and capitalism.

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But many are anxious about chemicals--acids to dissolve minerals and create cracks, surfactants to make fluids more slippery, agents to prevent bacteria that corrode pipes.

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It takes up to 1 millisecond to write a single one or a zero to flash, and the parts corrode with each stroke.

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Officials feared the brackish storm water that poured into subway tunnels and onto tracks could corrode vulnerable signal and switching systems, adding to the time workers will need to reopen the MTA's full system, which ferries 8.5 million passengers on a typical workday.

WSJ: Buses Back, But Subways Could Take Days Longer