The Main Reason That Surface Water Pollution Has Largely Decreased

question 13

Multiple Choice

The main reason that surface water pollution has largely decreased in the United States since 1950 is

• A)the Clean Water Act.
• B)a series of epidemics that inspired action.
• C)the discovery of newer technology that makes it cheaper not to pollute.
• D)decreases in water withdrawal for industrial uses.
• E)the emphasis in 1950 of watershed management.

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Definitions:

Twin Study

A research design in behavioral genetics that compares the similarity of twins raised in different environments to understand the genetic and environmental influences on human traits.

Genetic Bases

The underlying genetic factors that contribute to the physical and behavioral characteristics of an organism.

Schizophrenia

A severe mental disorder characterized by disruptions in thought processes, perceptions, emotional responsiveness, and social interactions.

Concordance

A concept used in behavioural research into the genetic bases of psychiatric disorders. When the disorder that characterizes one person, called the index case or proband, also occurs in another person, the two are said to display concordance. The degree of concordance is thought to reveal the influence of genetics.