Environement has no effect on your sklin's sebum production, this was all in your mind.
How many times do we have to repeart the same thing over and over again.
Sebum production is influenced by your male hormones and your male hormones only.
The rest is just speculation and not back-up by science.
Dude thats not true. For me, less humidity helps me completely. How in the world are you going to say its in my mind where i have many before and after pictures.