Figure 1.
Number of hours that PM2.5 concentrations exceeded 100 μg/m3 for all observations with locally weighted scatterplot smoothing (LOWESS) curves by the type of fuel used for cooking, May 2009 – April 2010
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.