Multinationals Create Market for Energy Credits DuPont and other multinational corporations announce the launch of the Chicago Climate Exchange. The effort is the first major attempt at establishing a market for cutting greenhouse gas emissions. NPR's David Schaper reports.

Multinationals Create Market for Energy Credits

Multinationals Create Market for Energy Credits

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DuPont and other multinational corporations announce the launch of the Chicago Climate Exchange. The effort is the first major attempt at establishing a market for cutting greenhouse gas emissions. NPR's David Schaper reports.