The Ozone Layer

The world has already faced a major global climate challenge: the hole in the ozone layer, discovered in 1985. Find out what ozone is, why it's important, and how the ozone hole is being repaired. Earth Science - Human Impacts - Learning Points. The ozone layer protects the planet by preventing most of the Sun's harmful ultraviolet rays from reaching the Earth. There are links between ozone depletion and global warming. CFCs are man-made substances that attack the ozone layer. CFCs have been banned in many countries so the ozone layer can slowly recover. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.