The novel coronavirus is giving us a novel glimpse of one of the many benefits to the planet that would occur if humanity could slow its roll.
But one unintended upside to this crisis has been improved air quality, particularly in the hardest-hit areas where the most draconian measures have gone into force. This has been evident in Asia, including China’s Hubei province, where this virus began spreading among humans. It’s also a trend observed in Italy, another devastated region with several thousand deaths.
Now, given that all but a handful of states have implemented stay-at-home orders, the air-quality shifts are also being seen in the United States. This offers a rare — and unintended — large-scale experiment for scientists to see how human emissions contribute to hazardous air quality and analyze the effectiveness of particular policy ideas…[snip]
…Before stay-at-home orders were issued March 16, Zhu said, the EPA’s Air Quality Index, which incorporates multiple air pollutants, including NO2 and PM2.5 (fine particulate matter), was about 60, or in the “moderate” category. Since then, it has improved by about 20 percent and recorded the longest stretch of “good” air quality in March seen since at least 1995.
When a sharp reduction in human presence and activity leads to visible improvements to the welfare and wellbeing of the planet and its other species, it is time to take a hard look at what we could be doing to live more lightly.