David Leffler, Savanna Strott, Salina Arredondo and Jana Cholakovska

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In 2005, Texas regulators documented startling amounts of benzene in a community outside Houston. Instead of solving the problem, they allowed a known benzene polluter to expand — a decision scientists worry could haunt residents for years to come.

In 2005, Texas regulators documented startling amounts of benzene in a community outside Houston. Instead of solving the problem, they allowed a known benzene polluter to expand — a decision scientists worry could haunt residents for years to come.