Looking at how the maps in the article are roughly the opposite of urban, I was a little hesitant to bring up the diesel particulate theory, but the maps actually could correspond to average amount of time in a vehicle..

If there is some kind of direct damage occuring to hormonal systems then it doesn't really have to correlate to weight and exercise related T2.

The roads of my childhood were definitely included higher polluting diesel trucks, but kids and pregnant women did spend a lot less time traveling and usually didn't ride in diesel vehicles themselves, there was that fine leaded gas..

That is unusually young for T2, the diagnosis might well change to T1.