Ozone hole at its smallest due to abnormal weather patterns news.sky.com

Warm weather is keeping the ozone hole at its smallest, but this is a freak weather event, not part of a trend says NASA.
Roughly seven to 25 miles above Earth's surface, the ozone layer shields the planet from potentially harmful ultraviolet radiation that can cause skin cancer and cataracts, suppress immune systems and also damage plants.

Back in 2001, scientists at NASA said they located the largest ozone hole ever recorded, covering 11.5 million square miles over Antarctica – although this size hasn't been reached since.