Royal Dutch Shell's decision to drop plans for a natural gas cracker is good news for residents of the Upper Ohio Valley and Pittsburgh regions. Recently Shell was fined $115 million for regularly underreporting emissions of pollutants and carcinogens at a Texas cracker. Officials in Houston have found crackers to be one of the biggest polluters in the region, and companies have even decided NOT to locate in the city because of its air pollution. Crackers emit high levels of VOCs, which combine with water and sunlight to form ozone. High ozone levels have been tied to increased levels of cardiac arrest, asthma and childhood leukemia. We aren't talking about the ozone layer or global warming: These are real, known impacts on the health of us and our children.