Idan muka yi tunanin wani daji, sai muyi tunanin wasu gungun bishiyoyi, da bishiyoyi da sauran tsirrai wadanda suke rayuwa tare da jerin dabbobi da kwari a muhalli. Amma saboda hauhawar yanayin zafi da raguwar ruwan sama, duk wannan rayuwa ana asararta, yana mai da kyakkyawan shimfidar wuri zuwa fatalwar daji.
Shuke-shuke wadanda a da suke da lafiya a yanzu fara mutuwa kadan-kadan daga tsananin zafi da rashin ruwa mai kyau.
Fatalwar gandun daji koyaushe sun wanzu, amma a cikin 'yan shekarun nan wannan lamarin ya kara sauri. Yayinda kankara a sandunan take narkewa sakamakon dumamar yanayi, matakin teku yana hawa yana sanya rayukan tsire-tsire da dabbobi iri-iri da ke rayuwa a gabar teku cikin hadari. Ruwan gishiri ya kara shiga cikin karkara, yana kashe tsire-tsire wadanda suka saba da ruwa mai dadi; Ba tare da abinci ko kariya ba, fauna suna zuwa neman wuri mafi kyau.
Wannan, kodayake yana faruwa a duk duniya, yana da matukar damuwa a ciki Arewacin Amirka, inda akwai dubban hekta da ke da bishiyoyi da zuwan ruwan gishiri, daga Kanada zuwa Florida.
Don haka, canje-canje na faruwa a cikin yanayin halittu. Inda a da akwai dazuzzuka, yanzu akwai fadama, wanda ke shafar muhalli ta hanyoyi daban-daban, misali: tsuntsayen masu ƙaura waɗanda suka dogara da gandun daji suna ganin an rage mazauninsu, amma yayin da ruwan ya zama mai daɗi, sai wurin ya zama mai ba da amfani yayin da dabbobin ruwa suka fara zuwa mallakar tekuna.
Yawan bayyanar wadannan dazuzzuka hujja ce karara cewa canjin yanayi lamari ne na hakika wanda dole ne mu kula da shi don daukar matakan da suka dace don kiyaye bala'i.