Ana bikin ranar muhalli ta duniya ( WED ) kowace shekara a ranar 5 ga watan Yuni kuma ita ce babbar hanyar Majalisar Dinkin Duniya don ƙarfafa wayar da kan jama'a da daukar matakan kare muhalli . An fara gudanar da shi a cikin shekara ta 1974, ya kasance dandalin wayar da kan jama'a game da al'amuran muhalli kamar gurbatar ruwa, yawan jama'a, dumamar yanayi, ci da kuma laifukan namun daji. Ranar Muhalli ta Duniya dandamali ne na duniya don wayar da kan jama'a, tare da halartar sama da ƙasashe 143 a kowace shekara. Kowace shekara, shirin ya ba da jigo da dandalin tattaunawa don kasuwanci, ƙungiyoyi masu zaman kansu, al'ummomi, gwamnatoci da mashahuran mutane don ba da shawara game da muhalli. Majalisar Dinkin Duniya ta kafa ranar muhalli ta duniya a cikin shekara ta 1972 a taron Stockholm kan muhallin dan Adam (5-16 Yuni 1972), wanda ya samo asali daga tattaunawa game da hadewar hulɗar ɗan adam da muhalli. Shekaru biyu bayan haka, a cikin shekara ta 1974 an gudanar da AURI na farko tare da taken "Duniya Ɗaya Kaɗai".