Some resources are not renewable - such as mineral deposits, petrochemicals and the like. Whether you use them quickly or whether you use them slowly, they don't come back. For this very reason it is hard to define overuse, since any use at all will have the same effect - depletion of the resource.
Adj. 1. altruistic-showing unselfish concern for the welfare of others. selfless. unselfish-disregarding your own advantages and welfare over those of others.
Example Sentences for altruists. 1  Therefore we are altruists in charity, missionaries of humanity, patriots at home. 2  They were, they unblushingly admitted, altruistsâinterested only in helping others. 3  The world owes these altruists, and all who have followed in the development of their work, a debt of happy gratitude.