San Fierro Fog?

In the trailer it shows the wind farm but if you look closley you can see heavy fog on the other side of a hill. Seems pertty suspicious that in the middle of a sunny desert there is a patch of heavy fog which was San Fierro's usual climate in GTA SA. Then you have a massive mountain riseing out of the fog, that mountain must at least be twice as big as the one closest in the screenshot. My prediction is that you are looking at the San Fierro area to the left with mount chilliad as the backdrop.