TEHRAN, July 1 (Xinhua) -- Senior diplomats from Iran and Qatar on Wednesday discussed the implementation of the recently signed U.S.-Iran peace memorandum of understanding (MoU) and challenges facing ...

什么是国家自主贡献（NDC）？ 《巴黎协定》要求各缔约方应编制、通报并保持它计划实现的连续国家自主贡献（NDCs）。