Michael K. Dorsey, a professor of environmental studies at Dartmouth and coauthor of Carbon Trading, says that while pollution trading programs work in the U.S. to control pollutants like sulfur dioxide, it will be hard to track such schemes in developing nations.

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Michael K. Dorsey, a professor of environmental studies at Dartmouth and coauthor of Carbon Trading, says that while pollution-trading programs work in the U.S. to control pollutants like sulfur dioxide, it will be hard to track such schemes in developing nations.

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One of those challenges is building on the work that we've done to control our own energy future while reducing pollution that contributes to climate change.

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