Ka taƙaita labarin:  Wani karamin 'wurare mai zafi' a kudu maso yammacin Amurka yana da alhakin samar da mafi girman adadin iskar gas mai gurɓataccen yanayi da aka gani a Amurka - kuma shine batun babban sabon bincike don gano dalilin. Wurin zafi, kusa da Hudu Corners intersection na Arizona, Colorado, New Mexico da kuma Utah, rufe kawai game da 2,500 murabba'in mil (6,500 murabba'in kilomita), ko rabin girman Connecticut. Taswirar kwanan nan ta NASA ta nuna tana samar da fiye da ninki uku na kimantawa na ƙasa - kuma masu bincike sun ce ba su san dalilin ba.. Gungura ƙasa don bidiyo. Yankin kusurwa huɗu (ja) shine babban wurin zafi na Amurka don fitar da methane a cikin wannan taswirar da ke nuna yadda yawan fitarwa ya bambanta daga matsakaicin matsakaicin matsakaici daga 2003-2009 (launuka masu duhu sun fi ƙasa da matsakaici; launuka masu haske sun fi girma). Wurin zafi, kusa da Hudu Corners intersection na Arizona, Colorado, New Mexico da kuma Utah, rufe kawai game da 2,500 murabba'in mil. Methane yana da matukar tasiri wajen kama zafi a cikin yanayi. Kamar carbon dioxide, yana da hannu wajen dumamar yanayi. Don yin lissafin yawan iskar gas da za a buƙaci don samar da maida hankali kan methane a cikin iska, marubutan sun yi kwatancen yanki mai ƙarfi ta amfani da samfurin jigilar sunadarai, wanda ke kwaikwayon yadda yanayin ke motsawa da canza abubuwan haɗin sinadarai a cikin iska. Masu bincike daga cibiyoyi da yawa yanzu suna cikin Yankin Hudu na Kudu maso Yammacin Amurka tare da jerin kayan aikin iska da na ƙasa, da nufin gano dalilan da ke haifar da wani'matsayi mai zafi' na methane wanda aka gano daga sararin samaniya. 'Tare da duk albarkatun ƙasa da na iska da ƙungiyoyi daban-daban ke kawowa yankin, muna da dama ta musamman don warware asirin Hudu na Hudu,' in ji Christian Frankenberg, masanin kimiyya a NASA's Jet Propulsion Laboratory, Pasadena, California, wanda ke jagorantar sashin NASA na ƙoƙarin. Sauran masu binciken sun fito ne daga Cibiyar Hadin gwiwar Bincike a Kimiyyar Muhalli (CIRES) a Boulder, Colorado; National Oceanic da...
Ƙananan'hotspot'wanda ke da alhakin samar da mafi yawan maida hankali ga iskar gas na greenhouse da aka gani a Amurka. Yankin da ke kusa da Hudu Hudu na Arizona, Colorado, New Mexico da Utah ya rufe kilomita 2,500. Hotspot ya riga ya zama sananne a yankin.