Problems of communication.
D000397:Air Pollution; D003142:Communication; D003226:Congresses as Topic; D004463:Ecology; D004777:Environment; D005246:Feedback; D007398:Interpersonal Relations; D007400:Interprofessional Relations; D010820:Physicians; D011845:Radio; D012919:Social Behavior; D012955:Societies, Medical; D013690:Television; D014857:Warfare; D014876:Water Pollution