HBS Working Knowledge Contributor

Corporations are facing great uncertainty. For the world to avoid the worst impacts of climate change, the United States eventually will have to put a price on carbon dioxide emissions, as has been done by Europe, parts of Canada, and California. To plan for the future, corporations need guidance on that potential pricing structure. At the same time, US businesses now wield more and more political power to influence such policy, thanks in part to Supreme Court rulings like Citizens United that enable them to spend unlimited sums on political campaigns.

http://www.forbes.com/sites/hbsworkingknowledge/2014/09/24/the-climate-needs-aggressive-ceo-leadership/