Major environmental degradation is quantifiable and undeniably human-caused

Evidence

As will be shown later, exoneration of the human connection is at odds with a mounting body of scientific evidence documenting it. Forests removed by clear-cutting, water supplies polluted by discharges of industrial and agricultural wastes and raw sewage, fish stocks depleted by overfishing with vast nets, and species made extinct by destruction of their habitats are but a few examples of environmental degradation that are plain to see, quantifiable, and unquestionably of human doing. — Albert Bandura, Moral Disengagement, 2715