Ozone 101: What Is the Ozone Hole?

The video explains the importance of the ozone layer in protecting Earth from harmful UV radiation. It details the factors leading to ozone depletion, such as the polar vortex and CFCs, and the formation of the ozone hole over Antarctica. The history of CFCs, their impact on the ozone layer, and the global response through the Montreal Protocol are discussed. Despite the protocol's success, the ozone hole persists due to the long lifespan of CFCs. The video concludes with an outlook on the gradual recovery of the ozone layer, expected by 2070.

What is the primary function of the ozone layer in the Earth's atmosphere?

• To filter out harmful ultraviolet radiation

• To provide oxygen for breathing

• To regulate Earth's temperature

• To support plant growth

Which of the following is NOT a factor contributing to the destruction of ozone?

• Chlorine and bromine compounds

• Carbon dioxide emissions

• Sun's rays

• Polar vortex

What role do polar stratospheric clouds play in ozone depletion?

• They facilitate chemical reactions that deplete ozone

• They increase the temperature of the stratosphere

• They block sunlight from reaching the Earth

• They prevent the formation of the polar vortex

What was the primary reason for the development of CFCs in the early 1900s?

• To enhance agricultural productivity

• To improve air quality

• To find a non-toxic refrigerant

• To create a new type of fuel

What significant international agreement was signed to address the issue of ozone depletion?

• Geneva Convention

• Montreal Protocol

• Paris Agreement

• Kyoto Protocol

Why do we still observe an ozone hole despite the regulations on CFCs?

• The ozone layer naturally depletes over time

• New CFCs are being produced in large quantities

• CFCs have long lifetimes in the atmosphere

• The regulations have not been implemented

By what year do scientists expect the Antarctic ozone to recover to healthy levels?

• 2100

• 2070

• 2050

• 2150