Yana da matukar muhimmanci a fahimci murhun muhalli /yar kwafi. 'Yan Adam da sauran kwayoyin suna samun jan ƙarfe /yar kwafiDaga yanayin ta cikin iska, ruwa da ƙasa.

Murji na tagulla

• Tawara daga Hukumar Majalisar Dinkin Duniya ta Majalisar Dinkin Duniya

• Jan ƙarfe:Alamar ci gaba mai dorewa

• Hukumar Duniya ta Ganin Duniya
• Alamar jan ƙarfe
•  Kamfanin Kamfanin Manyan