How Many Years Would It Take for Earth to Recover

question 46

Multiple Choice

How many years would it take for Earth to recover to pre-1950 ozone levels if all of the ozone-depleting substances were banned tomorrow? 

• A) about 50 years 
• B) about 75 years 
• C) about 100 years 
• D) about 125 years

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Definitions:

Anorexia Nervosa

An eating disorder characterized by an obsession with body weight or shape, leading to severe restrictions on food intake and often significant weight loss.

Eating Disorder

A group of serious conditions in which an individual is preoccupied with food and weight, leading to unhealthy eating habits and potentially life-threatening health problems.

Starvation

A severe deficiency in caloric energy intake, below the level needed to maintain an organism's life.

Binge-eating Disorder

A disorder characterized by repeated episodes of eating large quantities of food (often quickly and to the point of discomfort), usually accompanied by feelings of loss of control and distress.