1. What technological advances would have been most responsible for the major changes in human diet following the industrial revolution? Explain your choices and give examples.
2. Since the industrial revolution both the global population and the percentage of that population living in cities has surged upward. In 1800 the global population was 900 million with 18 million of these living in cities; in 1990 the respective numbers were 5.3 billion and 2.3 billion. Compare these two growth rates and explain the reason for the difference.