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.
a–d, Projected 24-hour average air pollution concentration at the end of spill in the winter (a,b) and summer (c,d) for fast-release spills (a,c) and slow-release spills (b,d). e, Population density plot.
