Ozone Layer Protection and Policies

In 1974, Rowland and Molina proposed that chlorine compounds could deplete the ozone layer. Their theory was confirmed by scientific evidence, leading to initial bans on CFCs in several countries. The discovery of the ozone hole in 1985 prompted further international action, resulting in the Montreal Protocol in 1987. This treaty, which has been revised multiple times, aims to phase out ozone-depleting substances. The protocol has been successful, with signs of ozone recovery expected between 2050 and 2100.

Who were the scientists that suggested chlorine-containing compounds could destroy ozone in 1974?

• James Lovelock and Susan Solomon

• Mario Molina and Paul Crutzen

• Frank Rowland and Mario Molina

• Paul Crutzen and Sherwood Rowland

Which countries first banned the use of CFCs in aerosol cans in 1978?

• Brazil, Argentina, Chile, and Peru

• Australia, New Zealand, Japan, and China

• United Kingdom, France, Germany, and Italy

• United States, Canada, Sweden, and Norway

What was the significant discovery made by British Antarctic Survey scientists in 1985?

• The presence of polar stratospheric clouds

• The first measurements of the ozone hole over Antarctica

• The impact of greenhouse gases on global warming

• The depletion of the ozone layer over the Arctic

What was the purpose of the Vienna Convention signed in 1985?

• To promote the use of renewable energy sources

• To establish a global carbon tax

• To protect the ozone layer by reducing ozone-depleting substances

• To ban all CFCs immediately

What was a key outcome of the 1990 meeting in London regarding the Montreal Protocol?

• The creation of a new international environmental agency

• The introduction of a carbon trading system

• The agreement to phase out CFCs and Halons entirely

• The establishment of a global fund for climate change

What are HCFCs used for in relation to CFCs?

• As a fuel for renewable energy

• As a complete replacement for CFCs

• As a temporary replacement with less impact on the ozone layer

• As a new type of greenhouse gas

In which year did the Montreal Protocol become the first universally ratified international treaty?

• 2015

• 2010

• 2020

• 2005

Why were HFCs added to the Montreal Protocol in 2016?

• They are more effective than CFCs

• They are cheaper to produce

• They are completely harmless to the environment

• They are strong greenhouse gases

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

• Between 2100 and 2150

• Between 2050 and 2100

• Between 2020 and 2030

• Between 2030 and 2040

What was the main reason for the success of the Montreal Protocol?

• Lack of industrial resistance

• Financial incentives for all countries

• Immediate ban on all harmful substances

• Strong compliance with its regulations