The Potential of Carbon Emissions Reductions of Public Bikes

Round 1

Reviewer 1 Report

The paper with Manuscript ID sustainability-1996952 and title "The potential of carbon emissions reductions of public bikes" is recommended for minor revision.

STRENGTHS:

The paper has good organisation and flow.

The paper makes good contribution to the field.

The paper has good arrangement and references.

The authors are knowledgeable in the area.

 

WEAKNESSES:

I recommend that authors improve upon the references and citations. See Page 2 line 132 shows "Rojas-Rueda D et al. (Error! Reference source not found.)" instead of "Rojas-Rueda D et al. [7]..."

In Page 8, add the region of the map used in the caption of "Figure 3. The heat map of bike stations."

Also ensure that every equation presented that is not original to the author is referenced.

Some proofreading and minor English language editing is suggested.

Though it is a review paper, the conclusion should show the highlights and the key conclusions.

I suggest authors improve upon the proposed prospects in this study and future research areas, with implications, such as impact based on bike manufacturing, bike charging, bike parking, bike security, bike stands usage, bike camera, bike ride and park, etc. 

Aside from carbon savings from the potential of carbon emissions reductions of public bikes, what other ways can be used to encourage more public bike riders that could be considered.

Improve the quality of Figure 11 as the x-axis is touching the values, make it clearer and more legible. Also check other images are clear too.

In Figure 10, I can see 3 trend lines but only two quantities in the legend. Fix it.

How was the study validated? Can this model proposed be applicable to work outside China such as in Canada, Holland, Germany, UK and USA? 

If any map used or other images are not original to the authors, there should be adequate permission and the source should be given.

 

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

It is my please to review the article entitled “The Potential of Carbon Emissions Reductions of Public Bikes” However, there it required extensive revision: i.e.,

1. First, one thing should be clarlified is it a bike or bicycle, as in Figure 4 authors used a bicycle, however all other places they used bikes.... Really confusing 
2. The authors need to do extensive literature and should mention what have done and how this study is different from the previously published. In addition, Lines 29-30 add this litature:https://doi.org/10.1016/j.tranpol.2021.04.014 
3. Line 36-37: https://doi.org/10.1016/j.retrec.2021.101112;https://doi.org/10.1016/j.jclepro.2020.124899  https://doi.org/10.1016/j.jenvman.2021.114050. Apart from these, there are multiple recent important pieces of literature that are not cited in this manuscript. 
4. Line 133, please check the reference 
5. Figure 5 reference for data?
6. what are the references/source of data for Figures, 6 and 8? please elaborate 
7. Similarly for Figure 10?
8. When the authors did carbon emissions calculation, how the Regional electricity carbon intensity is calculated, please elaborate
9. Regarding the Bike selected for province comparison, please (i) clarify the type of vehicle, and (ii) validate the representativeness of the vehicle.
10. How do the authors calculate the results? Did they use any LCA model/tools etc.?
11. The calculations in section 4.4 are not transparent enough and need improvement. Especially, table 3, how about the energy and emission coefficients? As maintained by the author provinces were considered for footprint calculations, and the footprint coefficients should be country-specific. I recommended a 100% transparent calculation process for this study. Supplementary information (SI) file, including step-by-step calculations instead of only one table, is needed.
12. For environmental management, discussions about policy directions should be added.

Best, 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

1. In Figure 5, the authors collected this information. they should mention the source here. 
2. what are the references/source of data for Figures, 6 , 7, and 8? please elaborate 
3. The author must cite the source here...... Especially, table 3, from where you got this information? 

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf