Bloomberg: Nations setting up carbon markets must standardize their emission-reduction benchmarks to ensure international efforts to limit global warming stay on track, according to Switzerlands climate envoy.
At least 30 of 200 countries meeting at talks this week in Bonn are developing carbon trading systems to help meet emissions targets under a worldwide treaty to start in 2020. Nations should measure greenhouse-gas cuts as tons of carbon dioxide even if they pursue hard-to-quantify policies such as...