US justice department sues two companies over pollution in Louisiana’s ‘Cancer Alley’
Japanese company Denka, along with US chemicals giant DuPont, have operated the plant that produces cancer-causing chloroprene
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### Instruction: US justice department sues two companies over pollution in Louisiana’s ‘Cancer Alley’

### Response: Japanese company Denka, along with US chemicals giant DuPont, have operated the plant that produces cancer-causing chloroprene