We know that Type 2 Diabetes is caused in almost all cases by obesity. The causative path has been well defined via the inflammatory results of obesity. Now along comes a bunch of authors who find that the change in local temperature, also known as Global Warming, is the putative cause of this obesity. Namely that fat people live in warm States.
The authors state:
Our findings indicate that the diabetes incidence rate in the USA and
prevalence of glucose intolerance worldwide increase with higher outdoor
temperature.
This is a correlation at best and NOT a causation. The problem is that one must look at the socioeconomic status. Just look at West Virginia. I know it well. Low economic status, poor diets, less exercise, and many folks on Government type meals, aka high carbs. It is not the temperature.
If one were to look worldwide, hot climates do not engender high BMI and in turn high rates of Type 2 Diabetes. It is just the opposite. The Congo is not filled with obese people and has low Type 2 Diabetes.
Besides all the authors are from the Netherlands. Perhaps a trip through West Virginia would help. Can they even find it on a map!