That water is a symbol of healing and renewal makes a lot of sense. Most of our human bodies are made up of water, and all other creatures also require water for survival. But we humans can take water for granted.

In a sprawling document published Sept. 2, the Vatican's International Theological Commission makes the case for developing an "ecological spirituality" in light of the Christian understanding of the Triune God.

His writings touched on conservation, community and belonging, and he acquired legions of fans beyond environmental studies — including many scholars of religion.