I don't think the fact that, on average, Americans overuse air conditioning can possibly be up for debate.
I travel a lot for work and every time I enter in a hotel room it's like I open the fridge door.
I see many girls in offices with HEATERS.
In the summer.
But, short sleeve shirts should be a constitutional crime against style, possibly punishable by death.
Wear a polo.
Sorry, my Italian genes obliged me to say this.