1.1.5 [related to the Economics in Practice on p. 371]

Microsoft and Disney are just two of a growing number of organizations using internal carbon taxes in an attempt to reduce carbon emissions, and the carbon prices being used to set the internal taxes vary widely. (In 2015, Microsoft priced carbon at $6-$7 per metric ton, and Disney used a price of $10 - $20 per metric ton.) Do some research to find three other companies or organizations that have also implemented an internal carbon tax. What are these companies or organizations doing with the revenue from these internal taxes? What price has each assigned to carbon, and how do the prices compare to the social cost of carbon as set by the Environmental Protection Agency?