If You Want to Cultivate Peace, Protect Creation
Pope Benedict XVI
2010 World Day of Peace Message
(Excerpt)
1. At the beginning of this New Year, I wish to offer heartfelt greetings of peace to all Christian communities, international leaders, and people of good will throughout the world. For this XLIII World Day of Peace I have chosen the theme: If You Want to Cultivate Peace, Protect Creation. Respect for creation is of immense consequence, not least because “creation is the beginning and the foundation of all God’s works”,[1] and its preservation has now become essential for the pacific coexistence of mankind. Man’s inhumanity to man has given rise to numerous threats to peace and to authentic and integral human development – wars, international and regional conflicts, acts of terrorism, and violations of human rights. Yet no less troubling are the threats arising from the neglect – if not downright misuse – of the earth and the natural goods that God has given us. For this reason, it is imperative that mankind renew and strengthen “that covenant between human beings and the environment, which should mirror the creative love of God, from whom we come and towards whom we are journeying”.[2]
Read the complete statement

Renewing the Earth
An Invitation to Reflection and Action on Environment in Light of Catholic Social Teaching
A Pastoral Statement of the United States Catholic Conference
November 14, 1991
(Excerpt)
Justice and the Environment
The whole human race suffers as a result of environmental blight, and generations yet unborn will bear the cost for our failure to act today. But in most countries today, including our own, it is the poor and the powerless who most directly bear the burden of current environmental carelessness. Their lands and neighborhoods are more likely to be polluted or to host toxic waste dumps, their water to be undrinkable, their children to be harmed.
Too often, the structure of sacrifice involved in environmental remedies seems to exact a high price from the poor and from workers. Small farmers, industrial workers, lumberjacks, watermen, rubber-tappers, for example, shoulder much of the weight of economic adjustment. Caught in a spiral of poverty and environmental degradation, poor people suffer acutely from the loss of soil fertility, pollution of rivers and urban streets, and the destruction of forest resources. Overcrowding and unequal land distribution often force them to overwork the soil, clear the forests, or migrate to marginal land. Their efforts to eke out a bare existence adds in its own way to environmental degradation and not infrequently to disaster for themselves and others who are equally poor.
Sustainable economic policies, that is, practices that reduce current stresses on natural systems and are consistent with sound environmental policy in the long term, must be put into effect. At the same time, the world economy must come to include hundreds of millions of poor families who live at the edge of survival.
Read the complete statement.
Peace with God the Creator, Peace with All of Creation
Pope John Paul II
1990 World Day of Peace Message

(Excerpts)
5. These biblical considerations help us to understand better the relationship between human activity and the whole of creation. When man turns his back on the Creator's plan, he provokes a disorder which has inevitable repercussions on the rest of the created order. If man is not at peace with God, then earth itself cannot be at peace: "Therefore the land mourns and all who dwell in it languish, and also the beasts of the field and the birds of the air and even the fish of the sea are taken away" (Hos 4:3).
12. But there is another dangerous menace which threatens us, namely war. Unfortunately, modern science already has the capacity to change the environment for hostile purposes. Alterations of this kind over the long term could have unforeseeable and still more serious consequences.
Despite the international agreements which prohibit chemical, bacteriological and biological warfare, the fact is that laboratory research continues to develop new offensive weapons capable of altering the balance of nature.
Today, any form of war on a global scale would lead to incalculable ecological damage. But even local or regional wars, however limited, not only destroy human life and social structures, but also damage the land, ruining crops and vegetation as well as poisoning the soil and water. The survivors of war are forced to begin a new life in very difficult environmental conditions, which in turn create situations of extreme social unrest, with further negative consequences for the environment.
Read the complete statement