Mr. Green on Bulbs, Building Materials, and Brouhahas

In the January/February 2006 issue of Sierra, Mr. Green tells readers what to do with a dead fluorescent bulb, weighs in on window materials, and explains why the environmental movement can't be counted out yet.

How many tree huggers does it take to change an efficient lightbulb? Are environmentalists an endangered species, or are our values "too deeply embedded in American culture to kill off"? Send your thoughts and questions directly to Mr. Green, or weigh in in the comments section.