Why is ozone declining?

Could you elaborate on the current trend of ozone decline? Is this a global phenomenon or localized to specific regions? What factors are contributing to this decline? Are there any significant changes in atmospheric composition or climate patterns that may be linked to the reduction in ozone levels? Additionally, how does ozone depletion impact the environment and human health? Are there any strategies or policies being implemented to mitigate this decline and restore ozone levels? I'm interested in understanding the underlying causes and potential solutions to this environmental challenge.