Does Going Green Mean Environmental Destruction?

The Los Angeles Department of Water and Power is the biggest publicly owned utility in the nation. Mayor Villagraigosa wants it to go green. Geothermal energy could replace coal-fired power plants, but there are tradeoffs. Geothermal sources are far away, and that means building new power lines. Will national forests and wildlife refuges be destroyed? On Reporter's Notebook, the Los Angeles Times Festival of Books.