Why is Xingtai so polluted?

The main reasons for the serious pollution in Xingtai are:

1. Vehicle exhaust 8.33% (II)

2. Burning coal in winter accounts for 20.83% (5)

3. Weather factor 4. 17% (1)

4. Industrial pollution is 66.67% (16)

5. Dust pollution 0.00% (0)