If waste is perceived by the generator as having little or no value, it will tend to be managed either at the lowest possible cost to themselves, or at minimum cost in compliance with legal requirements. The costs normally considered are the financial costs of waste management that occurred for the collection, treatment and disposal of waste. These costs may be offset in part by direct revenues from selling recovered materials or energy or the benefits of action to the society as a whole, such as resource efficiency, green job creation and a healthy and clean living environment.