The second major point regarding the experience of sustainable landscapes is that once made transparent, sustainable landscapes must ultimately be congruent. In other words, the emotional state provoked by the landscape's surfaces should be congruent with and not contradictory to the manner in which the core properties of the same landscape provide for our functional needs and well-being.If an air conditioned building that allows one group of people to feel like spring in the middle of summer simultaneously contributes to the painful death of others, the various levels of meaning and experience represented by the uilding cannot be congruent. On the other hand, if a constructed wetland not only safely processes the human wastes it receives but also provides safe habitat for birds and a recre ational venue for humans, it is most certainly a congruent and sustainable landscape There is, of course, a natural relationship between transparency and cungruency. Con gruency is often prevented by opaqueness-if we can't see how a landscape functions, we are inable to detect the possible incongruities Merely by an increase in landscape transparency, the natural human tendency toward congruity between thought, feeling, and action, between surface and core, will foster the remaking of a more sustainable environment.