Pope Francis's speech on the United Nations World Environment Day emphasizes the importance of world solidarity to counter what he deems a current culture of waste. One prevailing message is the danger of consumerism. The pope extends a challenges to forgo excessive wealth in exchange for living a more simplistic lifestyle, which can help combat world health and hunger issues.
The Pontifical Academy of Social Sciences prepared the following statement on climate change. It covers a wide range of associated sustainability issues. Various suggestions for societal interventions are also included within the statement.
On June 10, 2002, Pope John Paul II and Ecumenical Patriarch Bartholomew I issued a declaration on the environment. The introduction to the declaration is stated below:
"We are gathered here today in the spirit of peace for the good of all human beings and for the care of creation. At this moment in history, at the beginning of the third millennium, we are saddened to see the daily suffering of a great number of people from violence, starvation, poverty and disease. We are also concerned about the negative consequences for humanity and for all creation resulting from the degradation of some basic natural resources such as water, air and land, brought about by an economic and technological progress which does not recognize and take into account its limits."
A Statement of the United States Conference of Catholic Bishops was issued on June 15, 2001. This document covers a multitude of current environmental problems and the resulting negative impact on populations around the world - especially with regard to indigent populations. It stressed the connectivity of human behavior and it's impact on the planet.
Ecumenical Patriarch Bartholomew I of Constantinople addressed the United Nations of the Parties (COP 24) in Poland, December 3-14, 2018. He emphasized the collective responsibility among all citizens to alleviate the climate problems. One key point includes the urgency to focus on lighter carbon footprints to preserve the Earth to assist in alleviating poverty and suffering.
This circular Lenten Call for ‘Carbon Fast’, addressed to the Bishops of the Churches in South India, was provided on February 8, 2017 in Chennai, India, at the Church of South India Synod Secretariat. The circular emphasizes the desecration of the Earth as sinful. However, the call for a Carbon Fast can be considered one way to repent.
Below is a section of the introduction from A Bishops’ Letter about the Climate, which covers a multitude of critical environmental issues, from the 2014 Bishops' conference:
"We have lived with reports and forecasts of climate change since the 1980s. Our climate is the result of the interaction of complex systems and there is often a great distance between cause and effect in terms of both space and time. There are uncertainties and a lack of clarity. However, the knowledge we possess today does not allow us to postpone until tomorrow
what needs to be done now. Our human climate impact must decrease for the sake of the earth, for the sake of the world that God so loves that God gave us Jesus Christ."