The promise of the green economy and the clean-tech revolution is that they will bring a new wave of job opportunities — productive and respectable jobs at every part of the economic spectrum, from line workers to senior managers. Nonprofit groups like the Apollo Alliance have made this part of their raison d'etre. A steady drumbeat of studies since the late 1990s has told us that burgeoning markets for solar, wind, clean transportation, and other technologies would represent the next big wave of job creation. Cities and states have been positioning to become clean-tech hubs, eyeing the workforce development potential. Organizations representing low-income populations have been viewing the green economy as an entry point for those near the bottom of the economic ladder.