Final answer:
Discarding a theological definition of sin for a psychological or environmental one changes the basis of morality from divine to secular, encouraging a more interconnected and responsible approach to environmental stewardship and emphasizing moral responsibility towards nature.
Step-by-step explanation:
The significance of discarding the theological definition of sin in favor of a psychological or environmental definition is substantial as it shifts the understanding of sin from a religious concept bound by divine authority to a secular one influenced by human psychology and environmental factors. This transformation in perspective raises questions about the basis of morality and ethics, challenging the view that they are divinely ordained and suggesting instead that they may be shaped by human experiences and the world we inhabit.
In the context of environmental ethics, this shift is also significant. It repositions the narrative from a human-dominant perspective, endorsing exploitation of natural resources, to one that recognizes the interconnectedness and intrinsic value of all species and ecosystems. This change in viewpoint may encourage a more sustainable and responsible attitude towards environmental stewardship, as it emphasizes a moral responsibility to minimize harm to other species and to the natural world.