Most Rev. Thomas K. Oommen, the Moderator of the Church of South India, encourages Christians for observing a 'Carbon Fast' during the forthcoming Lenten Season. He has sent a circular citing this to all the leaders of the 24 Dioceses of the Church of South India.
You can find the circular attached here.
Prof. Dr. Mathew Koshy
Ecological Concerns Department, CSI Synod.