PhysOrg: Ozone is a naturally-forming gas in our atmosphere, but human activity has caused ozone to increase in the lower atmosphere (a component of air pollution, from causes such as vehicle exhausts and other industrial and agricultural activities) and decrease in the stratosphere (ozone depletion - due to historic emissions of CFC gases used in refrigeration and air conditioning).
It has long been understood that these ozone changes, as well as affecting human health, also contribute to climate change....