We certainly need to rethink the role of sewers in our urban environment. Are they really necessary and how can we recycle into safe clean products all the potential plant material from human food waste that normally clogs up the drains and provides a home for disease. What we treat with disgust now may in the future be our most valuable resources. Just think about the possibilities and see if you have any bright ideas like those of Carolyn.
http://www.ted.com/speakers/carolyn_steel.html
Time is, was and will be. Without time we would not be. What a load it has to carry! Time seems eternal! You might even ask whether cycles in time exist? If so read Roger Penrose's book on new attitudes in physics towards possible "Cycles in Time".
