Since 1981, HMMH has delivered expert assistance to more than 200 airports worldwide. We tackle the tough challenges of Environmental Assessments (EAs) and Environmental Impact Statements (EISs). We provide expert acoustical assistance related to Part 150 and Part 161 and their implementation programs and work with airports to develop sustainability plans and alternative power sources. We provide air quality assessments and assist in airport and airspace planning designs. In short, HMMH provides a full range of environmental and planning services to the aviation industry.