For this reason, the U.S. tax rules governing the dollar-for-dollar foreign tax credit require a U.S. company to exhaust all effective remedies to reduce its taxes under foreign law, or else the credit will be denied in other words, U.S. law expects a U.S. company to take responsible measures to reduce its foreign tax liability, because this has long been understood to be in the national interest.

FORBES: U.S. Corporations Act Responsibly in Reducing Foreign Taxes

But improved (yet still expensive) exhaust treatments have at least made it possible to reduce emissions to acceptable levels.

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The exhaust is treated at three points, three different ways, to reduce pollutants like mercury and dioxins.

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