A Heavy Fog And Haze In Shenyang City In China

Today, in Shenyang City in China, there is a great heavy fog and haze. The air pollution is great very severe. The air quality index is more than 500. There are full of is a strong, foul odour in the air. People don't want to go out for a walk today.

In winter, it is very cold in Shenyang. I think maybe the heating supply lead causes the air pollution. The burning of coal makes the fog and haze. Is there any other reasons [1]?

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[1] Be sure to match 'is' with a noun in its singular form, and 'are' with a noun in its plural form.  As examples:

"Is there any other reason?"

"Are there any other reasons?"