To be compatible with nature, we need to eliminate releases of materials that disrupt life. This obviously includes liquid effluent from pipes, smoke from chimneys, and spills onto the ground. However, as all products are ultimately disposable, it also includes products themselves. If there is no plan or system for product takeback and full reuse and cyclicity, then every product sold represents a toxic release. Despite materials and energy often appearing to be cheap, it still makes commercial and logical sense to use them wisely.
Less energy means less power station pollution, less metal means less mining, and so on.
Of course not. But unless we use our influence to actively design these problems out, they will still be there. When you've been looking at sustainable products for a while, you notice that the same solutions come up time and again. The product becomes more cyclic by making use of recycled metal, glass or plastic, by becoming more recyclable, or both. The product becomes more cyclic by making use of grown materials such as wood, leather and wool, or by becoming more compostable, or both.