Is a global treaty like the Kyoto Protocol—or whatever follows the pact that the United States has refused to sign—the path to reducing climate change? Proponents say yes, and it's time for America to show the way. Opponents say only ingenuity and market forces can achieve emissions goals. What do you think? Should the United States sign a binding treaty on greenhouse gas emissions? Or can fair-market forces do the trick? Post your thoughts, and don't forget to check out the debate in the April edition of U.S.News & World Report.
Previously: Omar al-Bashir, Under Arrest?