Chapter 7, Problem 7.4P

Interpretation Introduction

(a)

Interpretation:

The air emission and energy consumption per $1000$ paper sacks used and per $2000$ plastic sacks used are to be calculated.

Concept introduction:

Air emission is the measure of the amount of pollutants released in the air during any process. These air pollutants can damage the quality of air. Energy consumption is the amount of energy used during a process.

Interpretation Introduction

(b)

Interpretation:

The air emission and energy consumption per $1000$ paper sacks used and per $2000$ plastic sacks used, with an assumption that the used sacks are recycled by $60\%$, are to be calculated. The percentages by which air emission and energy consumption are reduced for each sack material, as a consequence of the recycling process, is to be calculated.

Concept introduction:

Air emission is the measure of the amount of pollutants released in the air during any process. These air pollutants can damage the quality of air. Energy consumption is the amount of energy used during a process.

Interpretation Introduction

(c)

Interpretation:

The number of grocery sacks used in a day in the United States is to be estimated. The average rate of energy consumption associated with the production, use, and disposal of these sacks is to be calculated. The amount of $\text{MW}$ saved by $60\%$ recycling process is to be calculated.

Concept introduction:

Air emission is the measure of the amount of pollutants released in the air during any process. These air pollutants can damage the quality of air. Energy consumption is the amount of energy used during a process.

Interpretation Introduction

(d)

Interpretation:

The important factors that were not taken into account in making the given decision, including considerations of the potential environmental impact of each type of bag is to be stated.

Concept introduction:

Air emission is the measure of the amount of pollutants released in the air during any process. These air pollutants can damage the quality of air. Energy consumption is the amount of energy used during a process.