Every day, the critical December summit in Copenhagen grows closer. All agree that climate change is an existential threat to humankind. The issue is complex. They involve political trade-offs and commitments of resources no leader can undertake lightly. Yet the elements of a deal are on the table. All we require to put them in place is political will. We need to step back from narrow national interest and engage in frank and constructive discussion in a spirit of global commonality. U.S. leadership is crucial. I am encouraged by the spirit of compromise shown in the bipartisan initiative announced last week by John Kerry and Lindsey Graham. A pair of U.S. senators coming together to bridge their parties' differences to address climate change in a spirit of genuine give-and-take.
