sentences:  In response, China has taken measures such as rapidly building out the water infrastructure and increased regulation as well as exploring a number of further technological solutions.Air pollution has become a major issue in China and poses a threat to Chinese public health.In 2016, only 84 out of 338 prefecture-level (administrative division of the People's Republic of China (PRC), ranking below a province and above a county) or higher cities attained the national standard for air quality.