Pope Francis has called for action on climate change, blaming human selfishness for global warming in his encyclical.
According to BBC, Pope Francis urged the rich in his letter to change their lifestyles to prevent the destruction of the ecosystem.
The Pope's remarks came ahead of the United Nations climate conference which will be held in Paris in December.
The encyclical aims to inspire everyone to protect the Earth.
Vatican spokesman Federico Lombardi launched the pontiff's second encyclical at a news conference on Thursday.