In celebration of Earth Day an article in America Magazine, “Top Ten Takeaways from ‘Laudato Si”, reminds us that Pope Francis’ revolutionary new encyclical calls for a “broad cultural revolution” to confront the environmental crisis. “Laudato Si” is also quite lengthy. Can it be summarized? In other words, what are the main messages, or “takeaways” of this encyclical?

1) The spiritual perspective is now part of the discussion on the environment.

The greatest contribution of “Laudato Si” to the environmental dialogue is, to my mind, its systematic overview of the crisis from a religious point of view. Until now, the environmental dialogue has been framed mainly with political, scientific and economic language… This does also not mean that other popes (and other parts of the church) have not spoken about the crisis—Francis highlights the teachings of his predecessors, particularly St. John Paul II and Pope Emeritus Benedict XVI. But in its systematic spiritual approach, this is a groundbreaking document that expands the conversation by inviting believers into the dialogue and providing fresh insights for those already involved.

2) The poor are disproportionately affected by climate change.

The disproportionate effect of environmental change on the poor and on the developing world is highlighted in almost every section of the encyclical. Indeed, near the beginning of “Laudato Si,” the pope states that focus on the poor is one the central themes of the encyclical, and he provides many baneful examples of the effects of climate change, whose “worse impacts” are felt by those living in the developing countries. This is not simply the result of the power of the rich to make decisions that do not take the poor into account, but because the poor themselves have fewer financial resources that enable them to adapt to climate change. Additionally, the natural resources of those poorer countries “fuel” the development of the richer countries “at the cost of their own present and future” (No. 52). Throughout the encyclical, the pope appeals to the Gospels, to Catholic social teaching and to the statements of recent popes to critique the exclusion of anyone from benefits of the goods of creation. Overall, in decisions regarding the environment and the use of the earth’s common resources, he repeatedly calls for an appreciation of the “immense dignity of the poor” (No. 158).

3) Less is more.

Pope Francis takes aim at what he calls the “technocratic” mindset, in which technology is seen as the “principal key” to human existence (No. 110). …

4) Catholic social teaching now includes teaching on the environment.

Against those who argue that a papal encyclical on the environment has no real authority, Pope Francis explicitly states that “Laudato Si” “is now added to the body of the Church’s social teaching” (No. 15). …

5) Discussions about ecology can be grounded in the Bible and church tradition.

Wisely, Pope Francis begins the encyclical not with a reflection on Scripture and tradition (the two pillars of Catholic teaching), which might tempt nonbelievers to set aside the letter, but with an overview of the crisis—including issues of water, biodiversity and so on. Only in Chapter Two does he turn towards “The Gospel of Creation,” in which he leads readers, step by step, through the call to care for creation that extends as far back as the Book of Genesis, when humankind was called to “till and keep” the earth. …

6) Everything is connected—including the economy.

One of the greatest contributions of “Laudato Si” is that it offers what theologians call a “systematic” approach to an issue. …

7) Scientific research on the environment is to be praised and used.

Pope Francis does not try to “prove” anything about climate change in this document. He frankly admits that the church does not “presume to settle scientific questions” (No. 188). …

8) Widespread indifference and selfishness worsen environmental problems.

Pope Francis reserves his strongest criticism for the wealthy who ignore the problem of climate change, and especially its effect on the poor. “Many of those who possess more resources seem mostly to be concerned with masking the problems or concealing their symptoms…” (No. 26). Why, he asks, are so many of the wealthy turning away from the poor? Not only because “some view themselves as more worthy than others,” but because frequently decisions makers are “far removed from the poor,” physically, with no real contact to their brothers and sisters (No. 90, 49). Selfishness also leads to the evaporation of the notion of the common good. This affects not simply those in the developing world, but also in the inner cities of our more developed countries, where he calls for what might be termed an “urban ecology.” In the world of “Laudato Si” there is no room for selfishness or indifference. One cannot care for the rest of nature “if our hearts lack tenderness, compassion and concern for our fellow human beings” (No. 91).

9) Global dialogue and solidarity are needed.

Perhaps more than any encyclical, Pope Francis draws from the experiences of people around the world, using the insights of bishops’ conferences from Brazil, New Zealand, Southern Africa, Bolivia, Portugal, Germany, Argentina, the Dominican Republic, the Philippines, Australia and the United States, among other places. (In this way, he also embodies the Catholic principle of subsidiarity, which, in part, looks to local experience and local solutions.) …

10) A change of heart is required

At heart, this document, addressed to “every person on the planet” is a call for a new way of looking at things, a “bold cultural revolution” (No. 3, 114). We face an urgent crisis, when, thanks to our actions, the earth has begun to look more and more like, in Francis’ vivid language, “an immense pile of filth” (No. 21). Still, the document is hopeful, reminding us that because God is with us, we can strive both individually and corporately to change course. We can awaken our hearts and move towards an “ecological conversion” in which we see the intimate connection between God and all beings, and more readily listen to the “cry of the earth and the cry of the poor” (No. 49).

To use religious language, what the pope is calling for is conversion.