Ozone levels in parts per million (ppm) registered in the southwest of Mexico City from January 1, 2008 to April 30th, 2016, which exceed the 0.165 ppm threshold.
Usage
data(o3)
Arguments
Format
A data frame with 47 observations on the following 2 variables.
date
date in the format yyyy-mm-dd
ozone_level
a numeric vector containing the ozone levels above 0.165 ppm