Understanding the Ozone Layer and CFCs

What was the primary reason for the initial use of CFCs in refrigeration?

• They were cheaper than other chemicals.

• They were non-flammable and non-toxic.

• They were more efficient at cooling.

• They were naturally occurring substances.

How do CFCs affect the ozone layer once they reach the upper atmosphere?

• They block UV radiation from reaching the Earth.

• They react with ozone, depleting it.

• They increase the thickness of the ozone layer.

• They convert ozone into oxygen.

What was the initial reaction of scientists to the sudden drops in ozone levels over the South Pole?

• They immediately blamed CFCs.

• They thought it was a measurement error.

• They believed it was a natural phenomenon.

• They ignored the data.

What was the main reason for the initial disbelief among scientists regarding the ozone hole?

• They believed the ozone layer was indestructible.

• They thought the instruments were faulty.

• They were focused on other environmental issues.

• They had no prior data on ozone levels.

What was the Montreal Protocol's main objective?

• To promote the use of renewable energy.

• To increase the production of CFCs.

• To reduce carbon emissions globally.

• To ban the use of CFCs worldwide.

What is the primary difference between ground-level ozone and upper-atmosphere ozone?

• Ground-level ozone is harmful, while upper-atmosphere ozone is beneficial.

• Ground-level ozone is beneficial, while upper-atmosphere ozone is harmful.

• Both are equally harmful.

• Both are equally beneficial.

How do CFCs contribute to global warming?

• They have no impact on global warming.

• They release methane into the atmosphere.

• They trap heat more effectively than carbon dioxide.

• They directly increase Earth's temperature.

What is a significant challenge in the recovery of the ozone layer?

• The increase in carbon dioxide levels.

• The lack of international cooperation.

• The cooling of the upper atmosphere.

• The continuous production of CFCs.

Which gases are known for their high global warming potential?

• Oxygen and nitrogen.

• Hydrogen and helium.

• CFCs and other high GWP gases.

• Carbon dioxide and methane.

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

• The increase in fossil fuel usage.

• The rapid development of CFC alternatives.

• The immediate recovery of the ozone layer.

• The reduction of global temperatures.