AUTHOR=Peng Weicai , Liu Xiangguo , Taghizadeh-Hesary Farhad 

TITLE=Carbon Monoxide Emission and Air Quality Analysis Based on an Improved Double-Weight Fuzzy Comprehensive Evaluation

JOURNAL=Frontiers in Public Health

VOLUME=Volume 9 - 2021

YEAR=2022

URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2021.790383

DOI=10.3389/fpubh.2021.790383

ISSN=2296-2565

ABSTRACT=In this paper, we adopt an improved double-weighted fuzzy comprehensive evaluation method to investigate the air condition of Hefei city from July 2016 to July 2021. We focus on the impact of the toxicity index, especially the impact of carbon monoxide, which is also considered in some other kinds of quality evaluation, such as water classification. Firstly, we find that with the increasing awareness of environmental protection and the government's attention to air quality in recent years, the air conditions have become better (the grades become lower). Second, the value of the factors PM2.5, PM10，SO2, CO, NO2, and O3 periodically fluctuate from year to year; and the periodicity of O3 is reversed with the other factors. Finally, the monthly average analysis shows that the overall air quality is good; all the grades are I-II except December 2017 is grade III. Furthermore, the air quality in the winter (especially in December and January) is always not good.