An article in today’s New York Times posed a similar question to readers alongside a story about people who have recently installed small wind turbines on their roofs but may never recoup the cost. The installations have been mostly in cities with a lot of wind, like Boston and San Francisco, but the problem is that the turbines might be too small to ever really provide enough energy for their installation to have been cost effective. A few people in the article (even someone from Harvard University) said that they wanted to install the turbines as an outward show...