“Paris’ First SARS-CoV-2 Lockdown Results in Reduced NOx and CO2 Emissions, per Gradient-Descent Optimization System Study”

https://pubmed.ncbi.nlm.nih.gov/38114451

The first SARS-CoV-2 lockdown in Paris resulted in a 40% decrease in NOx and 30% decrease in CO2 emissions, according to a new gradient-descent optimization system that monitors urban greenhouse gas emissions using continuous measurements of air quality and carbon dioxide.