Rich get parks, poor get pollution

Six-year-old Valentin Marroquin went from being apparently healthy one moment to battling leukemia the next. As his mother Rosario Marroquin started searching for answers, she kept coming back to their Houston, Texas, neighborhood, and the stench that often envelopes it.

1 of 3 "We're the stinky neighborhood," she said. "But we've gotten so used to it that we don't know that's just how we smell."

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