Into the future this utility from consumption is discounted at some rate ' Ï ' the rate of time preference for a given individual. Higher values for this rate of time preference imply less satisfaction from future consumption relative to current consumption spending.
Waste products are usually excreted by the kidneys. High levels of waste products in the blood may mean that the kidneys are not working as they should.
The byproduct sodium sulfate is considered a waste product but has marketability; both types of sodium sulfate, however, have several important and useful applications in various consumer products, such as in soaps and detergents, pulp and paper, and textiles.