The study looked at how greenhouse gases and ozone recovery will affect stratospheric climate in the 21st century. They used computer models to simulate temperature changes in different layers of the stratosphere. The results showed cooling in the middle and upper stratosphere, and warming in the lower layers. Greenhouse gases cause cooling, while ozone recovery causes warming. The simulations also revealed warming trends in polar regions due to increased planetary wave activity. Overall, increasing greenhouse gases may help stratospheric ozone recovery, leading to complex temperature changes in the stratosphere.