Fogs and no fog

Traveling along the North-South highway

I asked myself, as I travel by bus along the North-South highway. Some area have fogs and some do not have, my mind think about paranormal. There are plenty of fogs in some place and other place were just mists and some area no mists and fogs. The temperature was just normal. I believe if not paranormal then some type of plants released more vapor then others.