Reuters: China and the United States, the world's top producers of greenhouse gas emissions, pledged on Friday to formally adopt by the end of the year a Paris deal to slow global warming, raising the prospects of it being enforced much faster than anticipated.
The United Nations said 175 states took the first step of signing the deal on Friday, the biggest day one endorsement of a global agreement. Of those, 15 states also formally notified the United Nations that they had ratified the deal.
Many countries...