Using the Grey Model to Analyze the Impact of the Primary, Secondary, and Tertiary Industries on the Public’s Attention to Air Pollution in Three Cities

Table 1

Public attention of air pollution in Handan, Xingtai, and Shijiazhuang.

Year	Handan	Xingtai	Shijiazhuang
2014	1051	831	2278
2015	1215	965	2161
2016	1124	902	2128
2017	1468	1248	2418
2018	1491	1290	2286
2019	1416	1097	2168