The Ozone Layer Crisis and Recovery: Lessons from the 1980s

The video discusses the ozone layer crisis of the 1980s, highlighting the discovery of the ozone hole over Antarctica and the role of CFCs in ozone depletion. It details the global response, including the Montreal Protocol, which successfully curbed CFC emissions. The video also addresses the current status of the ozone layer, its recovery, and the ongoing challenges posed by climate change and HFCs.

What was one of the major environmental concerns discovered in the 1980s?

• Air pollution

• Water pollution

• Ozone layer depletion

• Deforestation

What is the primary function of the ozone layer?

• To absorb carbon dioxide

• To reflect sunlight

• To absorb ultraviolet radiation

• To trap heat

Which chemical compounds were identified as the main cause of ozone depletion?

• Carbon dioxide

• Chlorofluorocarbons (CFCs)

• Methane

• Nitrous oxide

What happens to CFCs when they reach the stratosphere?

• They become inert

• They break down into chlorine, which destroys ozone

• They are absorbed by clouds

• They break down into harmless substances

What was the global treaty called that aimed to phase out CFCs?

• Kyoto Protocol

• Paris Agreement

• Rio Declaration

• Montreal Protocol

What was a key factor in the success of the Montreal Protocol?

• High cost of implementation

• Lack of public awareness

• Resistance from industries

• Availability of practical solutions

What is the expected timeline for the complete recovery of the ozone layer?

• By 2050

• By 2025

• By 2065

• By 2100

What greenhouse gas was targeted in the 2016 amendment to the Montreal Protocol?

• Hydrofluorocarbons (HFCs)

• Carbon dioxide

• Nitrous oxide

• Methane

What is a major ongoing environmental challenge mentioned in the video?

• Water scarcity

• Climate change

• Soil erosion

• Deforestation

What is the significance of the Montreal Protocol in environmental history?

• It is the most successful environmental agreement

• It focused on water conservation

• It was the first treaty to address deforestation

• It was the first treaty to address air pollution