How the Montreal Protocol saved the Earth from a nightmare climate scenario

The video discusses the significant impact of the 1987 Montreal Protocol in preventing the collapse of the ozone layer and mitigating climate change. Without the protocol, increased CFCs would have led to severe environmental damage and a substantial rise in global temperatures. The study highlights that the protocol has prevented a 2.5°C increase in global warming. The UN's recent climate report shows progress in combating climate change, projecting lower temperature increases than previously expected.

What would have been the consequence of a continued increase in CFCs without the Montreal Protocol?

• A reduction in global temperatures

• An increase in plant growth and photosynthesis

• A worldwide collapse of the ozone layer

• A global decrease in ultraviolet radiation

How would the collapse of the ozone layer have affected carbon dioxide levels in the atmosphere?

• It would have increased CO2 levels by 40% to 50%

• It would have decreased CO2 levels by 40% to 50%

• It would have stabilized CO2 levels

• It would have had no impact on CO2 levels

What additional temperature increase would CFCs have caused by 2100?

• 3.3 degrees Celsius

• 2.5 degrees Celsius

• 1.7 degrees Celsius

• 0.5 degrees Celsius

What is the total contribution to global warming that has been avoided due to the Montreal Protocol?

• 4.5 degrees Celsius

• 3.5 degrees Celsius

• 2.5 degrees Celsius

• 1.0 degrees Celsius

According to recent reports, what is the current projected temperature increase by the end of the century?

• Between 3.3 and 5.7 degrees Celsius

• Between 1.0 and 2.0 degrees Celsius

• Between 2.1 and 4.6 degrees Celsius

• Between 4.0 and 6.0 degrees Celsius