Malaysia - Slogan Postmark

The slogan postmark shown at below image reads as:

HARI ALAM SEKITAR SEDUNIA 1979
5HB JUN, 1979
ALAM SEMULAJADI ADALAH WARISAN KITA
KEKALKANLAH

The translation of the slogan message is:

World Environmental Day 1979
5th June, 1979
Natural Environment is Our Heritage
Preserve It

Pulau Pinang; 27 June, 1979