The Catholic Church has always shown a profound concern for Creation and its protection. This is demonstrated by numerous documents, including, among others, Pope Paul VI's Populorum Progressio, John Paul II's Sollectudo Rei Socialis, and Benedict XVI's Caritas in Veritate, all sharing a common thread: the aspiration to a human ecology. With the 2015 Encyclical "Laudato Si', Pope Francis took a further step forward, emphasizing the importance of an integral ecology in which concern for nature, fairness toward the poor, and commitment to society are inseparable from joy and inner peace. The Encyclical "Laudato Si'" on care for our common home, while building on a path already charted by previous Popes, highlights the close correlation between the environment (understood as protection of the landscape and the right to health), ecology (defense of soil, air, and water from pollution), and the eradication of poverty, attention to the poor, and equitable access to the planet's resources. After having condemned the culture of waste and discard, Pope Francis affirms that cultivating and protecting Creation not only involves the relationship between humanity and the environment but also concerns human relationships because environmental ecology and human ecology go hand in hand. With this contribution, the Author, taking up some lines of research on the theme of the environment from the perspective of canon law, intends to pay particular attention to the orientations and actions suggested by the Encyclical, such as ecumenical commitment and dialogue in international and local politics. The results achieved by the Encyclical ten years after its promulgation will be illustrated, such as the convening of the Synod on the Amazon in 2019, and the measures taken in the Vatican City State on photovoltaics and, more generally, on a more sustainable economy.