Environmental ergonomics focuses on the interactions between humans and environmental factors such as temperature, humidity, noise, vibration, lighting, and air quality. The document discusses various types of ergonomics including physical, cognitive, organizational, and environmental ergonomics. It also provides examples of anthropometric measurements used in physical ergonomics like weight, height, skin fold thickness, and mid-arm circumference which are used to assess nutritional status. Work-related musculoskeletal disorders that can result from certain physical tasks or conditions are also mentioned.