CREATE TABLE table_73089 ("World Rank" FLOAT, "Company" TEXT, "Industry" TEXT, "Revenue  ( billion $ ) " TEXT, "Profits  ( billion $ ) " TEXT, "Assets  ( billion $ ) " TEXT, "Market Value  ( billion $ ) " TEXT)

Name the industry for revenue being 2.1
SELECT "Industry" FROM table_73089 WHERE "Revenue (billion $)" = '2.1'
SELECT "Industry" FROM "table_73089" WHERE "Revenue (billion $)" = '2.1'