Good thoughts, and thanks for the stars!

I need an idea how I might post this to the Google Earth Community -- recall that the air quality content is dynamic -- and a static version would lose the temporal aspects. There might be a clever way to use a static link to propel a user to dynamic content...

I also updated the main principal kmz. The effort has a name: AirWatch, and now has its own icon.

AirWatch now incorporates hourly updates for Mexico City's air quality. Like China, Mexico had language issues, and also has a unique way of posting their air quality --- they basically add a row to a table, then restart the table daily. It is a bit like solving a crossword to figure out how to capture the data.

My approach to resolve the varying air quality health indices is to work toward building a common air quality data table. The table will allow converting the various country health indices to their underlying concentration -- a common datum. With air quality in concentration, the the user could apply which ever country health index they wish -- or the World Health Organization standards.