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.
Pearson R for temporal correlations of central-site single pollutant and multipollutant indicators in (A) Atlanta, GA; (B) Denver, CO; (C) Houston, TX. The shading of the coefficient value and markers indicate the strength of Pearson correlation. Please view in color.
