Finally, taking seriously human dignity and the common good means having to take seriously the well-being of other creatures and natural world. The world is created by God. God sees this world as good. God gives human beings dominion over this good world. A Catholic perspective forbids abuse of the world and of other creatures for our own ends. A Catholic perspective obliges us to care for the environment in which we live. All things, created by God, have an intrinsic value which commands our respect. Things are good in themselves not simply good in relation to our needs. Human beings consequently have a duty to respect and protect the natural world as part of God's creation, as part of the goodness that God willed for human beings and their flourishing. Pope Benedict XVI states in his 2007 Apostolic Exhortation Sacramentum Caritatis, 'The world is not something indifferent, raw material to be utilized simply as we see fit. Rather, it is part of God's good plan, in which all of us are called to be sons and daughters in the one Son of God, Jesus Christ (cf. Eph 1:4-12).' And most recently, in his 2015 encyclical On Care for our Common Home, 'Laudato Si', Pope Francis speaks of an integral ecology that takes us to the heart of what is means to be human in the splendour of God's creation being called to care for all that exists. He begins his encyclical by quoting the 13th century Saint Francis of Assisi and then says: In the words of this beautiful canticle, Saint Francis of Assisi reminds us that our common home is like a sister with whom we share our life and a beautiful mother who opens her arms to embrace us. 'Praise be to you, my Lord, through our Sister, Mother Earth, who sustains and governs us, and who produces various fruit with coloured flowers and herbs'. This sister now cries out to us because of the harm we have inflicted on her by our irresponsible use and abuse of the goods with which God has endowed her. We have come to see ourselves as her lords and masters, entitled to plunder her at will. The violence present in our hearts, wounded by sin, is also reflected in the symptoms of sickness evident in the soil, in the water, in the air and in all forms of life. This is why the earth herself, burdened and laid waste, is among the most abandoned and maltreated of our poor; she 'groans in travail' (Rom 8:22). We have forgotten that we ourselves are dust of the earth (cf. Gen 2:7); our very bodies are made up of her elements, we breathe her air and we receive life and refreshment from her waters.