All data from: aqicn.org which has a different database
Updated now to match both and it´s looking nice:
# More AirQuality information
#
# You have to adapt the link yourself by searching on https://air-quality.com/
#
if ($show == true) {
$frame = 'airqualityPP';
$frm_ttls[$frame] = 'air-quality.com'; // name in menu
#$frm_src[$frame] = 'https://air-quality.com/place/germany/neum%C3%BCnster/ef9c7b3f?#lang=de&standard=aqi_us';
$frm_src[$frame] = 'https://aqicn.org/city/germany/schleswig-holstein/itzehoe/m';
$frm_hgth[$frame] = 1500;
}