Fill in the blank to complete the following statement from the book:

"Engineers not only find ways to reduce the cost of products and services, but they also organise and arrange the reliable delivery of these products and services so that people can effectively use them. The value from engineering, therefore, emerges from _                    _, which in this case is a supply of reliable, safe, clean drinking water."

(The answer may be a sentence, please type or paste this correctly).

According to the book, what is the definition of "opportunity cost"?

According to the book, what is the cost of potable water in much of the world today?

According to the book, two of the main attributes that distinguish expert engineers are

According to the book, to effect change in the world through new technologies, engineers need to be able to (mainly) influence: