COVID-19 and the environment
![COVID-19 and the environment](https://sites.uoguelph.ca/gier/files/2020/04/nitrogen_dioxide-430x430.jpg)
Due to the unprecedented halt of human activity during the COVID-19 pandemic, scientists have been noticing significant improvements in air quality worldwide. This phenomenon has been observed through satellite images across urban centres in China, Europe, the United States and Canada.