What causes smelly fall mornings?

COLUMBUS Ohio (WCMH) -- Many of us have been enjoying beautiful weather the past few weeks. Some, however, have noticed and complained about the smell in the mornings.While there could be a few explanations of what is causing the smell in certain areas, we can thank a couple of natural processes that make that smell more noticeable this time of the year, especially in the mornings.Decaying leaves can add to the smellThis time of the year, we are seeing more and more leaves hitting the ground. Th