CHICAGO - BP this week sold $200 million of tax-exempt bonds to launch a roughly $1 billion pollution-control project that's part of a controversial expansion of a crude oil refinery located in northwest Indiana.

Issued through the city of Whiting, the $200 million bond issue comes a few weeks after Whiting officials authorized the issuance of up to $1 billion in additional tax-exempt pollution control bonds to finance the four-year, $3.8 billion expansion project.

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