Hazo wani muhimmin bangare ne na zagayowar rayuwa a duniya. Yana tallafawa rayuwa ta kowane nau'i kuma yana da mahimmanci ga ci gaban tattalin arziki da noma na ƙasashe a duniya. Duk da juyin juya halin masana'antu na karni na 18, ayyukan noma ya kasance wani muhimmin al'amari na tattalin arziki a fadin duniya. Hatta manyan kasashen duniya kamar Amurka, Rasha, da China na daga cikin manyan masu samar da kayayyakin noma a duniya. Yayin da kasar Sin ke kan gaba wajen samar da kayayyakin amfanin gona, kasar Amurka na daga cikin manyan masu fitar da kayayyaki iri daya.
Tsayawa tattalin arzikin noma abu ne mai yuwuwa ba tare da isasshen ruwan sama ba. Tana taka rawa sosai wajen bunkasar tattalin arziki, musamman a kasashen da noma ya kasance babban bangare. Misali, a Tailandia, an gano isasshen ruwan sama a matsayin albarka ga larduna masu fama da talauci, wanda ke ba da gudummawa ga ci gaban tattalin arzikinsu. A wuraren da noma ke zama tushen samun kudin shiga, kamar a Afirka, sauye-sauyen da ba za a iya tantancewa ba a yanayin ruwan sama na iya yin tasiri sosai kan samar da abinci da ci gaban tattalin arziki.
Hakanan ruwan sama na iya shafar kasancewar samar da ruwa mai tsafta a cikin kasa. Isashen ruwan sama na taka muhimmiyar rawa wajen dorewar albarkatun ruwa da inganta tsaftar muhalli. Yana taimakawa wajen cika tafkunan ruwa na ƙasa waɗanda ke da mahimmanci ga ruwan sha da ban ruwa. Hakan na da matukar muhimmanci a yankunan da matsalar karancin ruwa ta zama babbar matsala. Tunda ruwan sama na daya daga cikin tushen tushen ruwa mai dadi a yankuna da dama a fadin duniya, ya zama wajibi a yi amfani da wannan ruwan cikin hikima da kuma adana shi domin cin nasara.
Anan ne manyan kasashe 20 mafi ruwan sama a duniya.
Rank | Kasa | Matsakaicin yawan hazo |
1. | Micronesia | 4,659 mm |
2. | Palau | 4,403 mm |
3. | Malaysia | 3,387 mm |
4. | Fiji | 3,227 mm |
5. | Sulemanu Islands | 3,184 mm |
6. | Papua New Guinea | 3,164 mm |
7. | Indonesia | 3,112 mm |
8. | Singapore | 3,045 mm |
9. | Marshall Islands | 2,993 mm |
10. | Costa Rica | 2,950 mm |
11. | Philippines | 2,942 mm |
12. | Suriname | 2,850 mm |
13. | Vanuatu | 2,831 mm |
14. | Colombia | 2,768 mm |
15. | Equatorial Guinea | 2,456 mm |
16. | Panama | 2,433 mm |
17. | St Vincent da Grenadines | 2,426 mm |
18. | Trinidad da Tobago | 2,413 mm |
19. | Belize | 2,327 mm |
20. | Comoros | 2,141 mm |