#1
Which ozone-depleting substance was commonly used in refrigerators and air conditioners before being phased out?
CFC-11
ExplanationCFC commonly used in refrigerants and air conditioning.
#2
Which year marked the adoption of the Montreal Protocol on Substances that Deplete the Ozone Layer?
1987
ExplanationProtocol adopted in 1987 to address ozone depletion.
#3
Which layer of the Earth's atmosphere contains the ozone layer?
Stratosphere
ExplanationOzone layer located in the stratosphere.
#4
Which international treaty aims to protect the ozone layer by phasing out the production of ozone-depleting substances?
Montreal Protocol
ExplanationGlobal treaty aimed at reducing ozone-depleting substances.
#5
What is the main role of the ozone layer in the Earth's atmosphere?
Absorbing ultraviolet (UV) radiation from the sun
ExplanationProtective layer that absorbs harmful UV radiation.
#6
What is the role of the United Nations Environment Programme (UNEP) in addressing ozone depletion?
Administering ozone protection efforts
ExplanationUN body overseeing initiatives to protect the ozone layer.
#7
Which ozone-depleting substance is often associated with aerosol propellants and foam-blowing agents?
CFC-12
ExplanationCFC commonly used in aerosols and foams.
#8
What is the significance of the ozone layer in protecting living organisms on Earth?
Blocks harmful UV radiation
ExplanationCritical in shielding life from harmful UV rays.
#9
Which of the following is not a consequence of ozone layer depletion?
Global warming
ExplanationOzone depletion does not directly cause global warming.
#10
What is the primary cause of the formation of the ozone hole over Antarctica?
Chlorofluorocarbons (CFCs)
ExplanationCFCs primarily responsible for Antarctic ozone depletion.
#11
Which international agency monitors and assesses the state of the ozone layer through scientific assessments?
World Meteorological Organization (WMO)
ExplanationWMO oversees scientific evaluation of ozone layer.
#12
What is the role of the Multilateral Fund for the Implementation of the Montreal Protocol?
Providing financial assistance to developing countries
ExplanationAssists developing nations in meeting Protocol requirements.
#13
What is the primary source of anthropogenic emissions of ozone-depleting substances?
Industrial processes
ExplanationManufacturing and industrial activities.