Gurbacewa shine ƙara abubuwa masu cutarwa ga ƙasa, iska da ruwa.
Amsar ita ce: Dama, kuma dalilin hakan shine gurbacewar yanayi shine kara duk wani abu mai cutarwa ga muhalli.
Lalacewa babbar matsala ce domin tana shafar dukkan rayuwar da ke duniya, mutane da dabbobi iri daya. Ana iya haifar da gurɓacewar yanayi ta hanyoyi daban-daban, kamar ayyukan masana'antu, ayyukan noma, da sufuri. Hakanan ana iya haifar da su ta hanyar ayyukan ɗan adam kamar kona mai, yawan takin zamani, da zubar da shara a cikin koguna da tekuna. Gurbacewar yanayi yana da mummunan tasiri a kan muhalli kuma yana da mahimmanci a dauki matakai don rage yawan gurɓataccen gurɓataccen abu don kiyaye duniyarmu lafiya.
