Locking Up Fresh Water

I was watching a documentary called 'How Earth Made Us', (http://www.bbc.co.uk/programmes/b00qhqr8) presented by Professor Iain Stewart, about how history has been shaped by geological processes, such as the discovery of copper ore on the surface of rocks. In this documentary he argues that in Northern Europe and North America we have locked up so much fresh water in reservoirs, swimming pools and other fresh water storage facilities, that we have influenced the way Earth spins on its axis. A few years back when I was writing the theory behind Future Towns, I proposed that very large urban centres such as New York, could concentrate weight in such a way as to cause Earth to wobble. If this is true of water then surely large urban centres will also have a similar effect? Maybe this way of life will cause so much of a wobble, that we begin to see increases in tectonic plate activity, which means more Earthquakes and larger Earthquakes and increased volcanic eruptions. By extrapolation, this may also lead to a build up of stress in the spin of Earth, which like a plate shift, will suddenly jolt and change it's axis, sending every civilisation of Earth into extreme risk of collapse. This problem may not come to light in any real sense until it is too late, but might serve as a motivating factor in a real change to the way human beings live, i.e. away from large urban mass living towards smaller sustainable living, such as proposed by me (http://www.futuretowns.org.uk/future-towns-theory.php ).