The Hallowich children were just 7 and 10 years old when their family received a $750,000 settlement to relocate away from their home in Mount Pleasant, Penn., which was next door to a shale-gas drilling site. By the time they’re grown up, they may not remember much about what it was like to live there — the burning eyes, sore throats, headaches, and earaches they experienced thanks to contaminated air and water. And maybe it’s better if they don’t remember, since they’re prohibited from talking about the experience for the rest of their lives.