This article discusses how human activities depleted Earth's ozone layer with substances like CFCs and halons but that the situation is improving due to bans on these harmful chemicals. Ozone, crucial for protecting life on Earth, was damaged by these chemicals, especially in polar regions. The Montreal Protocol and related laws helped limit ozone loss, improving the ozone layer's recovery prospects. Although it will take decades for a full recovery, signs of improvement in upper stratospheric ozone are already visible. However, future greenhouse gas emissions still pose the biggest uncertainty for the ozone layer's future thickness by the end of this century.