Predictions about the future are complicated by all of the following EXCEPT:

Predictions about the future are complicated by all of the following EXCEPT:

(A) the simultaneous existence of contradictory trends.
(B) profound changes in the preceding century.
(C) the lack of complex models.
(D) the widespread tendency in the 21st century to abandon cultural traditions.
(E) the vastness of the world economy

Answer: D

The greenhouse effect is best described as:

The greenhouse effect is best described as:

(A) the devastating reduction of rainforests.
(B) rising levels of chlorofluorocarbons.
(C) rising global temperatures caused by atmospheric buildup of gases.
(D) global shifts in wildlife patterns.
(E) extensive spread of industrial pollutants.

Answer: C

The wealthiest 20% of humans consume what percent of goods and resources?

The wealthiest 20% of humans consume what percent of goods and resources?

(A) 80%
(B) 40%
(C) 20%
(D) One-fourth
(E) One-fifth

Answer: A

Global environmental issues include

Global environmental issues include

(A) over-exploitation of key resources.
(B) air pollution that has reached critical levels.
(C) global warming.
(D) A and B.
(E) all of the above.

Answer: E