Abstract
In the contemporary ecological literature, the instrumental approach to nature is convincingly discredited and it is acknowledged that man's goals and the means for achieving them must be brought into accord with ecological demands. Moreover, the spiritual importance of nature for man is recognized: through contact with nature man can be morally improved. Ecological knowledge acquires a moral coloration and significance; the philosopher merely has to reveal and analyze the intellectual foundations of this knowledge, formulate by relying on them the general principles of an ecological ethics, and then draw from them standards and rules for human behavior, the criteria for what is inadmissible and for what must be from an ecological as well as a moral perspective. In a word, knowledge obliges