1 Correction to: Int J Coal Sci Technol (2020) 7(1):19–25 https://doi.org/10.1007/s40789-020-00297-1

In the original publication, there were few amendments to be made:

In Abstract, “4,844,500 tons” should be changed into “4.4845 million tons”.

The ordinate unit of Fig. 1 “million tons” should be changed into “billion tons”.

In Introduction Section, “China’s total coal production increased from 2.57 million tons in 2006 to 3.52 million tons in 2017.” should be changed into “China’s total coal production increased from 2.57 billion tons in 2006 to 3.52 billion tons in 2017.”

In the first sub-Conclusion, “SO2 The emission is 44845 tons” should be changed into “SO2 emissions were 4.4845 million tons”.

In the second sub-Conclusion, “34.42 million tons” should be changed into “34,420 tons”, “0.644 million tons” should be changed into “6440 tons”, “27.36 million tons” should be changed into “273,600 tons”, “170,266,000 tons” should be changed into “1,702,660,000 tons”, “0.012 million. Ton” should be changed into “212 tons”.