WFPL aired part one of the series Coal at the Crossroads today during Here and Now. If you missed it, the full audio and a slideshow are below. Tomorrow in part two, we'll look at the link between airborne mercury pollution and coal-fired power plants.Part One: California is known for its "green" reputation. Just look at all the new solar and wind farms popping up around the state. So it might be a surprise that residents in Southern California still depend on coal power when they turn on the lights. The region's utilities are struggling to wean themselves off coal energy. As Lauren Sommer reports, utilities around the country may soon be facing the same battle.