Environmental exposure-Adverse effects 2 Asthma-Etiology 1 Child-United States 1 Comparative method 1 Dissertations, Academic (Ph.D) 1 Ecosystem 1 Environmental Exposure 1 Environmental Exposure-Adverse effects-United States 1 Environmental Pollutants-Adverse effects-United States 1 Environmental health-United States 1 Environmental pollutants-Toxicity 1 Environmentally induced diseases 1 Health risk assessment 1 Population dynamics 1 Risk Assessment 1 Risk communication 1 Thesis (Ph.D)-Environmental Science 1 Toxicology-Environmental aspects 1 adverse effects 1 methods 1