Chapter 5, Problem 7STP

Summary Introduction

Introduction :

The biosphere currently supplies the basic needs for over six billion humans in the form of natural resources. The human population continues to grow and the growth is not evenly distributed throughout the world. An increase in human population growth increases the need for natural resources to supply the basic needs of the population.

Answer to Problem 7STP

Correct answer :

The correct answer is option (D) 93.9.

Explanation of Solution

Explanation/justification for the correct answer :

Option (D) 85.6.

According to the graph given in the question,

The percentage of the United States energy consumption in 2002 of nonrenewable resources was

swa $\begin{array}{l}=\frac{39.5+24+23+8.3}{39.5+24+23+8.3+6.2}\times 100\\ =\frac{94.8}{101}\times 100\\ =.9386\times 100\\ =93.86\\ =93.9\end{array}$

So, the correct answer is option (D).

Explanation for incorrect answer :

Option (A) 8.3. According to the graph, the percentage of the United States energy consumption in 2002 of nonrenewable resources was 93.9. So, this is an incorrect option.

Option (B) 22.7. Petroleum, natural gas, coal, and nuclear are the nonrenewable resources in the given graph. The consumption of nonrenewable resources of United States in 2002 was 93.9 percent. So, this is an incorrect answer.

Option (C) 39.3. In 2002, 93.9 percent nonrenewable resources energy was consumed by United States. So, this is an incorrect answer.