The city's annual average concentration of airborne fine particulate matter, or PM2.5, declined to 30 micrograms per cubic meter last year, city officials said.
China's Tibet Autonomous Region will strive to build three cities, including the regional capital Lhasa, into waste-free cities by 2025, according to regional authorities.
China will strive to eliminate heavy air pollution events in 70 percent of its major cities by 2025, according to an action plan unveiled on Thursday.
Despite the complexity of the global and domestic environment, Shanghai's GDP in the first nine months stood at 3.1 trillion yuan ($428 billion), reflecting the local economy's resilience and vitality, experts and officials said on Thursday.
Southwest China's Tibet Autonomous Region has poured 12.7 billion yuan (about 1.8 billion U.S. dollars) on ecological protection over the past decade, authorities said.