Example Sentences for desuetude. 1  The laws against heresy have fallen into desuetude in England, but while they lasted they were simply ferocious. 2  This fashion, Germans inform you, is falling into desuetude; but it falls slowly. 3  This custom was kept up until early in this century, when it fell into desuetude.
Eutrophication (Greek: eutrophia (from eu well + trephein nourish.); German: Eutrophie), or more precisely hypertrophication, is the ecosystem's response to the addition of artificial or natural nutrients, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.
There are two types of eutrophication: natural eutrophication and anthropogenic eutrophication. Eutrophication is widespread in freshwater ecosystems, and it plays a major role in the normal aging process of many ponds and lakes. The main cause of anthropogenic eutrophication is human activity. Nutrients from fertilized fields, lawns, and farms are deposited in rivers, streams, lakes and oceans when it rains.