I live in a city that is going to rationalize water so i want to be nearly independent with my water and only needs to add more water on the system eventually. The water i get from the grid is already potable i belive but there is no harm in a system capable of getting the water potable before th...

Vegans argue, that most of the grain goes for livestock fattening. How many people can feed field/pasturage (having the same area)? Here is some references with opposite view: http://www.lierrekeith.com/book-ex_the-vegetarian-myth.php http://adaptt.org/veganism.html# in section Animal Ag and E...