As a nurse with decades of hospital experience, I've sat through nights with patients dying of respiratory failure, and calmed frightened parents as their children struggled to breathe during asthma attacks. These experiences caused me to focus my work on preventing illness instead of waiting until people are too sick to live active, fulfilling lives. Many of my colleagues in the public health field have similar motivations. Our goal is to prevent people from being exposed to toxins that cause disease. Our challenge seems to be those who think that corporations should be free to expose others...