The encyclical letter Laudato Si is available here on the Vatican website. Human growth and maturity makes possible the adoption of relationships that manifest something of God’s relationships. One of these adoptions is consideration for the environment.
240. The divine Persons are subsistent relations, and the world, created according to the divine model, is a web of relationships. Creatures tend towards God, and in turn it is proper to every living being to tend towards other things, so that throughout the universe we can find any number of constant and secretly interwoven relationships.[Cf. Thomas Aquinas, Summa Theologiae, I, q. 11, art. 3; q. 21, art. 1, ad 3; q. 47, art. 3] This leads us not only to marvel at the manifold connections existing among creatures, but also to discover a key to our own fulfilment. The human person grows more, matures more and is sanctified more to the extent that he or she enters into relationships, going out from themselves to live in communion with God, with others and with all creatures. In this way, they make their own that trinitarian dynamism which God imprinted in them when they were created. Everything is interconnected, and this invites us to develop a spirituality of that global solidarity which flows from the mystery of the Trinity.