The thinning of the ozone layer increases the amount of UV-B radiation reaching Earth's surface, which can cause severe health and environmental issues. For humans, overexposure to UV-B can lead to sunburns, skin cancer, and cataracts. It also negatively impacts agricultural productivity by reducing crop yields and harms aquatic ecosystems by damaging phytoplankton and other marine organisms. While the Antarctic ozone hole remains a significant concern, the Arctic experiences less severe thinning due to warmer stratospheric conditions. Continued international efforts are essential to ensure the ozone layer's recovery and mitigate these risks.