Pope St. John Paul II, Encyclical Evangelium Vitae 42

... the dominion granted to man by the Creator is not an absolute power, nor can one speak of a freedom to ‘use and misuse,’ or to dispose of things as one pleases. The limitation imposed from the beginning by the Creator himself and expressed symbolically by the prohibition not to ‘eat of the fruit of the tree’ (cf. Gen 2:16-17) shows clearly enough that, when it comes to the natural world, we are subject not only to biological laws but also to moral ones, which cannot be violated with impunity".