A daily input of water, food, and energy of various kinds is matched by an output of sewage, solid waste, air pollutants, energy, and materials that have been transformed in some way.
Like other human beings, he encounters moral issues even in everyday performance of his routine duties—he is not supposed to cook his experiments, manufacture evidence, or doctor his reports.
Now he finds immigrant craftsmen gathered in abundance outside his store in the early morning, waiting for it to open so they can buy supplies for the day's work as contractors.
Although many advertising design professionals focus their energy on the creative end of the spectrum, psychology and marketing often spill over into their everyday work.
The bridge, built last November for about $600, 000, is being monitored with deflection sensors and other instruments, and so far is holding up under the daily onslaught of traffic.