Pope Francis declared September 1 as the World Day of Prayer for the Care of Creation, as the Orthodox Church has done since 1989. You can read the full letter here.
According to Pope Francis, “The annual World Day of prayer for the Care of Creation offers to individual believers and to the community a precious opportunity to renew our personal participation in this vocation as custodians of creation, raising to God our thanks for the marvellous works that He has entrusted to our care, invoking his help for the protection of creation and his mercy for the sins committed against the world in which we live.”
Some options for the liturgy on this day include:
RESOURCES:
USCCB (website)
>USCCB Bulletin Insert
Catholic Climate Covenant
>Prayer and Worship Resources
"Holy Hour" for the Care of Creation (Pontifical Council for Justice and Peace)
Creation Justice Ministries
Ignatian Spirituality (Jesuits)
Catholic Agency for Overseas Development (UK)
Catholic Health Association
A Catholic Season of Creation – Sundays of September (Columban Missionaries)
Global Catholic Climate Movement (care should be taken with this site; not all resources are in conformity with the Roman Missal and Catholic liturgical practices)
Season of Creation (Ecumenical)