The ecological aspect of catholic moral theology should not evoke astonishment, as it is not a strange hybrid created by means of artificial manipulations aiming at bestowing authority of Christian tradition on ecology. Popes' statements concerning natural environment conservation seem to testify against such claims and only show the importance and need of implementing responsible and moderate using the Earth's resources into Christian awareness. Practical ethical problems in the ecological aspect I started to present from the natural law, which determines divine moral order in the world, also in the ecological dimension. Then I undertook the problem of an ecological conscience, which is a kind of a "watchman" of our morality, also as far a...