1. Discuss how demographic transition correlates with changes in consumption of resources, especially energy.

2. Explain how the arguments in the article in praise of "fast food" are contradictory to the model that Johann von Thunen proposed. Does it mean that we no longer need to teach/learn about the von Thunen model?

3. When flowers from, say, Colombia are sold at stores here in the United States, the local florists' revenues could be affected because the flowers from Colombia are way cheaper than the local flowers. But, Colombians earn money via flower exports. Are all these consistent with the ideas discussed in the "I, Pencil" essay?