Here is a short (not comprehensive) list of resources to find hymns and songs concerning creation, creation-care, ecological justice, and more.
Calvin Institute of Christian Worship
A multi-cultural list by Joan Huyser-Honig with subcategories of creator/creation, lament, caretakers, short songs, and more.
Sojourners Creation Blog List
Sojourners (Sojo.net) has curated a list of their blogs dealing specifically with creation hymns and songs.
Let All Creation Praise
Letallcreationpraise.org has created a list of hymns and worship resources specifically addressing creation care, ecological justice, and similar topics to help support “The Season of Creation.” Many hymns and selections feature Hymn Society members and friends.