Introduction

COVID-19 is a pandemic that affected humans’ lives and activities through the year 2020 in a way that was not witnessed in recent years. Many governments declared a complete lockdown as a try to stop the transmission of the disease. This lockdown resulted in a good recovery in environmental health, where air pollutants levels dramatically decreased.

Theory

There are two relations between air pollution and COVID-19, one is before the disease spread, and the other is after. Before the disease spread, many areas had high levels of contaminants in the air due to industrial activities, transportation, and human density. These areas had the highest infection rates and death cases. This could be attributed to two reasons, the aerosol could help to spread the virus at a higher rate, and air pollutants could negatively affect peoples’ lungs, which assisted the virus in attacking the patients brutally.

Results

After the disease spread, the lockdown that was applied in the major industrial countries led to a decrease in the pollutants levels and an increase in the ozone level in the air. This lockdown improved the air quality worldwide to a level that all political conferences and agreements could not reach. In this review, we are showing the impact of COVID-19 on air pollutants in different countries.

Summary

This paper provides information about pollutants' influence on human and environmental health that other researchers obtained in different areas of the globe before and after the pandemic. This could give ideas about the impact of humans on the environment and the possible ways of recovering the environment's health.

中文翻译：

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COVID-19 对不同国家空气质量和污染的影响

介绍

COVID-19 是一种流行病，它在 2020 年以一种近年来没有出现过的方式影响了人类的生活和活动。许多政府宣布全面封锁，试图阻止这种疾病的传播。这种封锁导致环境健康状况良好恢复，空气污染物水平急剧下降。

理论

空气污染与 COVID-19 有两种关系，一种是在疾病传播之前，另一种是之后。在疾病传播之前，由于工业活动、交通运输和人口密度，许多地区的空气中污染物含量很高。这些地区的感染率和死亡率最高。这可以归因于两个原因，气溶胶可能有助于以更高的速度传播病毒，空气污染物可能会对人们的肺部产生负面影响，从而帮助病毒对患者进行残酷的攻击。

结果

疾病传播后，主要工业国家实施的封锁导致污染物水平下降，空气中的臭氧水平上升。这种封锁将全球空气质量提高到所有政治会议和协议都无法达到的水平。在本次审查中，我们展示了 COVID-19 对不同国家空气污染物的影响。

概括

本文提供了其他研究人员在大流行前后在全球不同地区获得的有关污染物对人类和环境健康影响的信息。这可以提供有关人类对环境的影响以及恢复环境健康的可能方法的想法。