Laura Dunn takes Green back to Louisiana's Cancer Alley

We’ve been on the road to Baton Rouge for an hour when Laura Dunn, a 25-year-old student filmmaker dressed in bell bottoms and platform shoes, snaps in a CD playing "Gasoline Dreams," a song by hip-hop band OutKast. "All right! all right! all right! all right! all right!" the song begins, prompting a burst of dancing in the front seat from Dunn, who will prove on this trip that she is as willful as she is energetic. Her light brown hair bobs, and she laughs, which she does easily. "Don’t everybody like the smell of gasoline!" the song booms. Suddenly the dancing stops and Laura is still. "Hey, that could be our theme song," she says to David Carroll, a 34-year-old musician who approached her after a screening and said he wanted to help. He does media relations; today’s he’s driving to Baton Rouge. "Don’t everybody like the smell of gasoline. That’s so perfect."

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