# Air--Pollution--Research--United States { "id": "S85002584", "title": "Air--Pollution--Research--United States", "url": "/topics/S85002584", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "321db41943fe3927", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "900724323524937220", "address_version": "morton4x16-v1", "coordinates": [ 0, 20, 17445, 24576 ], "answer_status": "Directory metadata; local answer requires separate source review", "truth_status": "Subject descriptor, not a factual answer or a demonstrated knowledge gap" } Directory metadata is not a factual answer or evidence of a global knowledge gap. Source: https://id.loc.gov/authorities/subjects/sh85002584 No owner-reviewed local answer yet.