Ma'aikacin tsaftar Muhalli
Gurbatarwa shi ne gabatar da abubuwan gurɓatawa a cikin mahalli wanda ke haifar da mummunan canji. Gurbatar yanayi na iya ɗaukar nau'ikan abubuwa masu guba ko kuzari, kamar su amo, zafi, ko haske. Gurɓatattun abubuwa, abubuwan haɗin gurɓataccen yanayi, na iya kasancewa ko dai baƙin abubuwa/ kuzari ko kuma gurɓatattun abubuwa masu gurɓatawa. Gurbataccen yanayi galibi ana sanya shi a matsayin tushen tushe ko gurɓataccen tushe mara tushe. A shekarar 2015 kuma, gurbatar yanayi ya kashe mutane miliyan 9 a duniya.

Sigogin Gurbatar Muhalli 
An tsara manyan sifofin gurɓacewa a ƙasa tare da takamaiman ƙazantar da ta dace da kowannensu:

 Gurbacewar Ruwa
 Gurbacewar Iska
 Gurbacewar Haske
 Gurbacewar Sauti
 Gurbacewar Kasa

Manazarta