Types of environmental assessments include screening, class screening, comprehensive studies, mediation, and review panels. Screening involves documenting the project, identifying ways to minimize environmental effects, and recommending further assessment if needed. For some projects, class screening or comprehensive studies are required. Mediation is a voluntary negotiation process that can help resolve issues efficiently. A review panel with experts may also be convened if public concerns warrant further examination. Damage assessments for disasters consider impacts to buildings, land, crops, human lives, employment, and more. Metrics include structural damage, debris removal costs, deaths, illnesses, lost productivity, and treatment expenses.