There is a very close connection between respect for the human being and the safeguard of creation. ‘Our duties towards the environment flow from our duties towards the person, considered both individually and in relation to others’ (n. 12). If the person becomes degenerate the environment in which e lives deteriorates; … In fact, it is possible to note a reciprocal influence between the human face and the ‘face’ of the environment: ‘when “human ecology” is respected within society, environmental ecology also benefits’ (Encyclical Caritas in Veritate n. 51).

Benedict XVI, 43rd World Peace Day Message, 1 January 2010

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