Kasuwancin sharara a duniya shi ne kasuwancin sharar gida tsakanin ƙasashe don ƙarin magani, zubarwa, ko sake amfani da su . Kasashe masu tasowa ne sukan shigo da shara masu guba ko masu hadari daga kasashen da suka ci gaba. Rahoton Bankin Duniya Menene Sharar gida: Binciken Duniya na Gudanar da Sharar Sharar, ya bayyana adadin dattin da aka samar a wata ƙasa. Musamman kasashen da ke samar da dattin datti sun fi ci gaban tattalin arziki da ci gaban masana'antu. Rahoton ya bayyana cewa, "[g] gaba daya, yayin da karuwar tattalin arziki da kuma karuwar al'ummar birane, mafi yawan sharar da ake samarwa." Don haka, ne, ƙasashe a Arewacin Duniya, waɗanda suka fi haɓaka tattalin arziƙi da ƙauyuka, suna samar da datti fiye da ƙasashen Kudancin Duniya . Hanyoyin kasuwancin kasa da kasa a halin yanzu suna bin tsarin sharar da ake samarwa a Arewacin Duniya da kuma fitarwa zuwa da zubar da su a Kudancin Duniya. Dalilai da yawa sun shafi ƙasashen da suke samar da sharar gida kuma a wane girma, sannan kuma gami da wurin yanki, matakin masana'antu, da matakin haɗa kai cikin tattalin arzikin duniya.