Many thanks for sharing this ORB .
As someone been brought up in the Potteries in the fifties I bet that would have registered red with all the coal fired pottery kilns and steel works.
But India is disgusting and China pretty bad . But what about Tasmania registering red . Cant understand that
But Grand Folks City Hall in BC is surprisingly a place to avoid ?
And Ukraine is healthier than Moscow at the moment !
You may find that some areas are artificially high because (in no order of possibility):
1. The monitoring equipment is faulty / not been calibrated correctly;
2. The monitoring station is located at a regular traffic jam spot, heavily used junction / traffic lights or roadworks, or even a well-used industrial or delivery business that has a lot of comings and goings of vehicles or one like a school where there's a very busy period at certain times of the day.
3. The monitoring station is near and airport, factory or (in the case of Australia, which uses them a LOT to generate electricity) oil or especially coal-fired power stations, which are obvious pollution (and likely heat) blackspots and aren't likely representative of an area or region. Especially if the factory etc is a 24/7 operation.
4. The weather will also play a big role, with very hot areas likely being worse affected, especially if there's little wind.
5. It depends upon the specific location of the monitoring station - sheltered, the orientation on a wall/building (whether the prevailing wind affects it and to what degree) how far from the road / fixed sources of pollution, even the height to which it is placed.
Without such context, we have no idea whether the measurements give a realistic measure of the type of pollution (which only covers some types as well) covered in a particular area.
At least I suppose the samples are every few minutes/hours and that does provide some context, such as those high readings in Tazmania.
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