AP BIOLOGY

ECOLOGY

HUMANS AND THE BIOSPHERE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Ozone depletion in the atmosphere has been caused by ____
A
monoculture
B
CFC’s
C
suburban sprawl
D
soil eroision
Explanation: 

Detailed explanation-1: -Gaseous CFCs can deplete the ozone layer when they slowly rise into the stratosphere, are broken down by strong ultraviolet radiation, release chlorine atoms, and then react with ozone molecules. See Ozone Depleting Substance.)

Detailed explanation-2: -Once in the atmosphere, CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules.

Detailed explanation-3: -Chlorofluorocarbons (CFCs) are anthropogenic compounds that have been released into the atmosphere since the 1930s in various applications such as in air-conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans, and as solvents.

Detailed explanation-4: -Human activities effectively punched a hole in it, through the use of gases like chlorofluorocarbons (CFCs) in spray cans and refrigerants, which break down ozone molecules in the upper atmosphere.

Detailed explanation-5: -It took many decades for scientists to discover that when CFCs break down in the atmosphere, they release chlorine atoms that are able to rapidly destroy the ozone layer which protects us from ultraviolet light.

There is 1 question to complete.