The heart of a new global climate deal begins to take shape

New analyses are giving mixed grades to the most recent greenhouse gas emissions targets submitted to the United Nations, with particularly low marks for the pledge from South Korea.

A new study by the Climate Action Tracker (CAT) — a consortium of scientists and energy modelers — declared South Korea’s pledge to cut emissions 37 percent below business-as-usual levels by 2030 “inadequate.” That target ultimately was more ambitious than ones the Korean government initially considered, but CAT analysts said it is still consistent with a global temperature rise between 3 to 4 degrees Celsius by 2100.