New York Times: After more than two decades trying but failing to forge a global pact to halt climate change, United Nations negotiators gathering in South America this week are expressing a new optimism that they may finally achieve the elusive deal.
But underlying that optimism is a grim reality: No matter the outcome of the talks, experts caution, it probably will not be enough to stave off the increasingly significant, near-term impact of global warming.
For the next two weeks, thousands of diplomats from...