124 Any approach to an integral ecology, which by definition does not exclude human beings, needs to take account of the value of labour, as Saint John Paul II wisely noted in his Encyclical Laborem Exercens . According to the biblical account of creation, God placed man and woman in the garden he had created (cf. Gen 2:15) not only to preserve it (“keep”) but also to make it fruitful (“till”). Labourers and craftsmen thus “maintain the fabric of the world” ( Sir 38:34). Developing the created world in a prudent way is the best way of caring for it, as this means that we ourselves become the instrument used by God to bring out the potential which he himself inscribed in things: “The Lord created medicines out of the earth, and a sensible man will not despise them” ( Sir 38:4).
Source: Laudato Si' (Vatican.va)