Science Is Fun By Tomas Rosko on Instagram: "The Montreal Protocol (adopted in 1987) successfully phased out most of the ozone-depleting substances (particularly CFCs, halons, etc.). As concentrations of these destructive gases decline, the ozone layer’s recovery is underway. Many forecasts, based on current levels and models, suggest: In most of the world (non-polar regions), ozone levels could return to 1980 levels by **~ 2040**. Over the Arctic, recovery is often projected around 2045. Over A