‘Leaders have acknowledged that in their quest to get all countries on board to cutting carbon, the Paris architecture has a built-in downside: Commitments are voluntary and based not on science but on what countries feel they can reasonably offer. The collective targets won’t keep temperatures below the 2-degree-Celsius “guardrail,†but diplomats say they hope the deal will create a strong system that encourages a routine ratcheting up of ambition.’
via Paris Climate Accord Aims to Speed Transition to Clean Power for All – Scientific American.