Laudato si' (Praise Be to You) is the second encyclical of Pope Francis. The encyclical has the subtitle "on care for our common home". In it, the pope critiques consumerism and irresponsible development, laments environmental degradation and global warming, and calls all people of the world to take "swift and unified global action." The encyclical, dated 24 May 2015, was officially published at noon on 18 June 2015, accompanied by a news conference. The Vatican released the document in Italian, German, English, Spanish, French, Polish, Portuguese and Arabic, alongside the original Latin. The encyclical is the second published by Pope Francis, after Lumen fidei (The Light of Faith), which was released in 2013. Since Lumen fidei was largely the work of Francis's predecessor Benedict XVI, Laudato si is generally viewed as the first encyclical that is entirely the work of Francis. [[File:John Zizioulas presents the encyclical Laudato si' at the press conference in Rome.webm|thumb| John Zizioulas, Eastern Orthodox metropolitan of Pergamon, presents the encyclical Laudato si at the press conference in Rome. ]] The title of the social encyclical is a Central Italian phrase from Francis of Assisi's 13th-century "Canticle of the Sun" (also called the Canticle of the Creatures), a poem and prayer in which God is praised for the creation of the different creatures and aspects of the Earth. The tone of the Pope's phrasing has been described as "cautious and undogmatic, and he specifically calls for discussion and dialogue." For example, he states in the encyclical (#188): There are certain environmental issues where it is not easy to achieve a broad consensus. Here I would state once more that the Church does not presume to settle scientific questions or to replace politics. But I am concerned to encourage an honest and open debate so that particular interests or ideologies will not prejudice the common good.