Her battleground was the Tri-County region surrounding her hometown in Montgomery County, Pennsylvania, 40 miles northwest of Philadelphia and 20 miles southeast of Reading, on the Schuylkill River. An alarming number of children and adults who lived in the area surrounded by the three major polluters that formed the "Toxic Triangle"-the Pottstown Landfill, Occidental Chemical, and the Limerick Nuclear Power Plant-were getting sick and dying from...