Figure 5.
Monthly mean PM2.5 concentrations for Taipa Ambient during the previous year of 2019 and COVID-19 pandemic in 2020 (January to March).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.