Review Reports

Round 1

Reviewer 1 Report

I would like to thank the authors for the useful work. The work is well presented. The results are beneficial for other researchers. Some comments to consider:

1- The abbreviations should be defined once mentioned for the first time such as GDP and DID.

2- All the terms in the equations should be defined for readers.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

This study focuses on the regulation of pollution permit for key industries CO2 emissions reduction.The topic is worthy to reading for this journal readers. Here are some suggestions to the authors.

1.Please check the Fig.3, it seems like one year was deleted?

2. For formula (6), please check the spell of the words.

3.Please add more information on processing steps of formula in Section 3.1.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 3 Report

I read the whole manuscript very carefully. I have to find out lots of novelty in this manuscript. As per my suggestions it is acceptable in this form.

Author Response

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Author Response File: Author Response.docx