Quote Originally Posted by DuncanONeil View Post
Similar issue is Ozone days. Why are all the sensors placed in places known to have naturally higher levels of ozone. The result is higher reports of ozone over the entire area.
If it really were for "clarification" why then hide the "fudge factor"?
I think you're confusing normal atmospheric ozone, such as the ozone layer, with man made ozone, that you get from the burning of fossil fuels. "Ozone days" are, I presume, a measure of air pollution, generally caused by weather conditions holding such pollution close to the ground. You place your sensors where the pollution tends to accumulate, not out in the countryside where it will generally be always low. These measurements are for local consideration only, and are not of global interest.