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HCFCs Are a Temporary Solution to the Problem of Ozone

question 39

Multiple Choice

HCFCs are a temporary solution to the problem of ozone depletion and will be replaced over the next 20 years by which class of compounds?


Definitions:

Multiple sclerosis

A chronic autoimmune disorder affecting the central nervous system, marked by damage to the myelin sheath that covers nerve cells, leading to neurological symptoms.

Alzheimer's disease

A progressive neurodegenerative disorder that causes memory loss, cognitive decline, and ultimately, loss of ability to carry out the simplest tasks.

Failure to thrive syndrome

This syndrome describes a condition in infants and children who have significantly slower physical development than normal, often due to malnutrition, emotional neglect, or underlying health problems.

Down syndrome

A genetic disorder caused by the presence of all or part of a third copy of chromosome 21, characterized by physical growth delays and distinctive facial features.

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