Washington Post: Ever since negotiators failed to agree on a climate accord in Copenhagen five years ago, diplomats have been trying for a big, international do-over. Talks in Lima, Peru, this month put this effort on track to conclude an agreement in Paris next year.
The trade-off is that the accord will be insufficiently ambitious and difficult to enforce, in part because of the intransigence of developing countries.
It cannot be the final word on the global response to climate change -- just an early step....