On average, Americans eat three hamburgers a week. That's a national total of nearly 50 billion burgers per year. And burgers typically cost only a few dollars from fast food joints. That seems pretty cheap. But what we don't…

The Sacramento San Joaquin delta waterway is a source of water and trouble. Photo by Spencer Michels. When I was in junior high school in San Francisco, in the early 1950s, I had a student teacher in social studies…