Ka taƙaita labarin:  Daga ƙanshin sabon kofi zuwa ƙanshin jirgin karkashin kasa, New York tana da nata ƙanshin ƙanshin ƙanshi. Duk da yake wannan cakudawar, a wasu lokatai, tana iya zama mai karfi, a baya a ƙarni na 19, ƙamshi a cikin birni ya fi tsanani da kuma dindindin fiye da yadda yake a yau. Da yawa, cewa hukumomin kiwon lafiya a lokacin sun yanke shawarar ƙirƙirar taswirar wari don nuna wurin wari daga yankuna kamar matatun mai, mai mai, gidajen yanka da ayyukan gas. A cikin karni na 19. 'Yan New York sun fara gunaguni ga Hukumar Kiwon Lafiya game da' mafi yawan ƙazanta, ƙazanta, ƙazanta, da ƙazanta. 'A sakamakon haka, yawancin masana'antun da suka fi ƙazanta sun ƙare a Brooklyn, tare da yanayin masana'antu suna barin alamun su a can a yau. Alal misali, yankin Newtown Creek a kan iyakar Brooklyn da Queens ya kasance wurin da aka yi amfani da magungunan ruwa. Yanzu CityLab ta sami ɗaya daga cikin waɗannan taswirar tarihi daga 1870 wanda ke nuna wurare daban-daban na masana'antu a fadin Manhattan da Brooklyn, yayin da ba a haɗa gundumomi biyar ɗin ba tukuna. Amma ba ƙamshin masana'antu ba ne kawai ke jawo wa mutanen New York matsala. An buga taswirar ne a lokacin da birnin New York ke samun ƙaruwa sosai. A cikin shekarun 1860 da 1870, an gina sabbin gine-gine 2,000 a kowace shekara, yayin da bakin haure ya kai 200,000 zuwa 300,000 mutane a kowace shekara. Ƙara yawan jama'a yana nufin ƙara yawan sharar gida. An gina wuraren wanka na jama'a, maɓulɓulan ruwa, da kuma banɗaki a shekara ta 1897, kuma ƙudaje sun cika tituna. A sakamakon haka, 'yan New York sun fara gunaguni ga Hukumar Kiwon Lafiya game da' mafi yawan ƙazanta, ƙazanta, ƙazanta, da kuma ƙazantacciyar ƙazanta ',. A ƙarni na 19, an yi imani cewa waɗannan ƙamshi suna ɗauke da cututtuka, saboda haka Hukumar Kiwon Lafiya ta Birnin New York ta ƙirƙiri taswirar don nuna wuraren da abin ya shafa. 'Yunkurin nuna kamshi, wanda ba na zahiri ba ne - ba a iya gani, ba su da daɗewa, suna canzawa koyaushe - kawai aikin al'adu ne mai ban sha'awa,' in ji Melanie Kiechle, masanin tarihi a Jami'ar Virginia Tech ya gaya wa...
A cikin karni na 19, an yi imanin cewa ƙanshin ƙanshi daga masana'antu irin su slaughterhouses na iya ɗaukar cutar. Wasu kamfanoni, irin su shuke-shuke masu tsabtace ruwa, sun ƙare a Brooklyn don kiyaye wari daga Manhattan. Iska har yanzu tana dauke da wari daga Brooklyn zuwa Manhattan, yana haifar da matsaloli tsakanin masu tsarawa a cikin gundumomi biyu.