See this online text:

See also this other text/ebook on ecological issues written primarily from the perspective of the natural sciences:

  • Geosphere-Biosphere Interactions and Climate: Scripta Varia 96, by the Working Group of 9-13 November 1998 of the Pontifical Academy of Sciences (Vatican City: Pontifical Academy of Sciences, 2001). Published by the Cambridge University Press. The ebook is available at the Pontifical Academy of Sciences. The paper copy may be purchased at Cambridge University Press and at Amazon.
    • The genesis of the essays contained in the text is explained thus on the websites of Nature and the Pontifical Academy of Sciences: “From 9-13 November 1998 an important workshop was held at the Pontifical Academy of Sciences. This workshop on the subject of Geosphere-Biosphere Interactions and Climate was concerned with those environmental and climatic changes which may pose a threat to human society during the course of the next century… This meeting of world experts at the Pontifical Academy of Sciences summarised our present-day knowledge about the subject and identified gaps in our understanding of how the earth’s climate is affected by greenhouse gases, deforestation, and the circulation of the oceans.”
    • [N.B. (Legal Notice): The text shows that its copyright is held by the Pontifical Academy of Sciences, and also states that “no reproduction of any part may take place without the written permission of the Cambridge University Press.” Since the pdf copy of the text was made available on a webpage of the copyright holder’s website, we have assumed that it is lawful to link to the said webpage. If this is incorrect, please inform us immediately so we may remove the link.]

See also these texts/ebooks written primarily from the perspective of the philosophical and theological sciences:

  • The Challenge of Climate Change and Environmental Justice: A Distinctive Catholic Contribution”, by Thomas G. Wenski, Notre Dame Journal of Law, Ethics & Public Policy, Vol. 23, pp. 497-514 (2009). Available in PDF format at the Notre Dame Journal of Law, Ethics & Public Policy.
  • A Deeper Ecology: A Catholic Vision of the Person in Nature” by Mary Taylor, Communio: International Catholic Review, Volume 38 (Winter 2011). Available in PDF format (on this page) at Second Spring.
  • Ecology and the Common Good: Sustainability and Catholic Social Teaching”, by Russell Butkus and Steven Kolmes, Journal of Catholic Social Thought, Vol. 4, No. 2 (2007): pp. 403-436. Available in pdf format at the University of Portland.
  • Encyclical Letter “Laudato Si’” on Care for Our Common Home, by Pope Francis, 24 May 2015. May be read online at the Holy See.
  • The Green Popes: Benedict XVI and John Paul II on the Environment, by Brother Ignatius Schweitzer, O.P. (New Haven, CT: Knights of Columbus Supreme Council, 2010). With Imprimatur. Part of the Veritas Series “Proclaiming the Faith in the Third Millennium”, under General Editor Father Juan-Diego Brunetta, O.P., Director of the Catholic Information Service, Knights of Columbus Supreme Council. Available in pdf format on this page of the Knights of Columbus Supreme Council.
  • “’If You Want To Cultivate Peace, Protect Creation’: Message for the Celebration of the World Day of Peace, 1 January 2010”, by Pope Benedict XVI, 8 December 2009 (Libreria Editrice Vaticana, 2009). May be read online at the Holy See.

Posted in observance of Earth Day, 2019. For other online texts and legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject).

“What air is for biological life, the Holy Spirit is for the spiritual life; and as there is air pollution, that poisons the environment and living things, there is also pollution of the heart and the spirit, that mortifies and poisons spiritual existence. In the same way that we should not be complacent about the poisons in the air — and for this reason ecological efforts are a priority today — we should also not be complacent about that which corrupts the spirit.

“But instead it seems that our minds and hearts are menaced by many pollutants that circulate in society today — the images, for example, that make pleasure a spectacle, violence that degrades men and women — and people seem to habituate themselves to this without any problem. It is said that this is freedom but it is just a failure to recognize all that which pollutes, poisons the soul, above all of the new generations, and ends up limiting freedom itself.

“The metaphor of the strong driving wind of Pentecost makes one think of how precious it is to breathe clean air, be it physical air [with our] lungs, or spiritual air — the healthy air of the spirit that is love — with our heart.” (Pope Benedict XVI, Homily on the Solemnity of Pentecost, 31 May 2009. Paragraph breaks supplied.)