Environmental Factors: Performance of essential functions may require exposure to adverse environmental conditions, such as dirt, dust, pollen, odors, wetness, humidity, rain, fumes, temperature and noise extremes, hazardous substances like blood or bodily fluids, toxic agents, traffic hazards, bright/dim lights, animal/wildlife attacks, animal/human bites, disease, pathogenic substances, or rude/irate customers. Physical Ability: Tasks require physical demands such as mobility for navigating different locations, including offices and fieldwork sites, requiring actions like sitting, standing, walking, and bending or some combination of climbing and balancing, stooping, kneeling, crouching, and crawling, and that generally involves the ability to lift and carry materials, usually around 10 - 15 pounds or more with assistance.