The Ozone Layer

The video explains the importance of the ozone layer in protecting Earth from harmful UV rays. It discusses the discovery of the ozone hole over Antarctica, primarily caused by CFCs used in aerosols and fridges. Although CFCs were banned in the 1990s, their effects persist for decades. The ozone layer is slowly recovering, but full repair will take time due to links with global warming. Protecting the ozone layer is crucial for life on Earth.

What is the primary function of the ozone layer in the stratosphere?

• To absorb harmful ultraviolet rays

• To trap greenhouse gases

• To produce oxygen

• To reflect sunlight

Which harmful effect is NOT caused by excessive UV light exposure?

• Improved plant growth

• Increased risk of cancer

• Premature aging of the skin

• Sunburn

What was discovered over Antarctica in 1985?

• A new continent

• A large oil reserve

• A vast hole in the ozone layer

• A new species

What are chlorofluorocarbons (CFCs) primarily used in?

• Solar panels

• Water purification systems

• Aerosols and fridges

• Electric cars

What is the expected timeline for the ozone layer to fully recover?

• 100 years

• 50 years

• 20 years

• 10 years