In this interview, Bill McKibben opens the Global Teach In on Wednesday by reviewing the scale of environmental challenges that corporate power and carbon-lobby pose for humanity as a whole. Asked to address economic alternatives, he notes that there are many welcome projects but cautions that the scale and pace of change require an immense social movement to challenge corporations and governments. If successful, these social movements will find that that tomorrow's economy favors decentralized development and job creation. In terms of strategy, McKibben identifies the elimination of oil/carbon subsidies as an important and strategic target for the short term. The Global Teach In was organized by Jonathan Feldman, MIT-trained economist currently teaching at the University of Stockholm (Sweden), and grew to involve more than 20 cities across 7 countries, including Austria, South Africa and Venezuela.