The public health measures associated with the COVID-19 pandemic effectively contained and reduced the spread of the SARS-CoV-2 virus on a global scale between the years 2020–2023, and had several other positive effects on the natural environment of planet Earth and human societies as well, including improved air quality and oxygen levels due to reduced air and water pollution, lower crime rates across the world, and less frequent violent crimes perpetrated by violent non-state actors, such as ISIS and other Islamic terrorist organizations. Wikipedia