"Hijau" is Zainal Abidin 's song . It was released on May 30, 1991 as the first single from Zainal's first solo album which used his name as the album title . This song was created and written by Mukhlis Nor and it is quite famous for raising the theme of the environment . Since then, this song has become Zainal's signature song as well as launching his solo music career after leaving the group Headwind .
