It seems Kerry slept through his science courses at Yale. Otherwise he would know that a molecule of Ozone (O3) is HEAVIER than a molecule of Oxygen (O2) or Nitrogen (N2) and therefore Ozone will always sink from the so-called “Ozone Layer” to the Earth.
Well then, how can there even be an “Ozone Layer”?
Because, when Oxygen in the upper atmosphere absorbs UV rays from the Sun, some of that Oxygen combines to form Ozone. This chemical process explains the so-called “Ozone Layer: and the “Ozone Hole”. That “hole” “grows” over whichever of the Earth’s poles is experiencing Winter because that pole is TURNED AWAY from the Sun.
A final point: heavy molecules — like Freon (Chlorodifluoromethane = CHClF2) with a molecular weight of 57 — cannot “swim” against the pull of the Earth’s gravity through an atmosphere composed of N2 (weight 14) and O2(weight 16) to “attack” ozone in the upper atmosphere.
Simple gravity explains why the “Montreal Protocol” has NOT closed our so-called “ozone holes”. Kerry’s ignorance notwithstanding...