Our city has huge signs on some city buses saying we should save water. While on the surface this seems to be a good idea, it is simply not. Most people are likely not to read the sign. What we need is a solution to a certain degree. The common sense would be to place the solution on the bus. Namely, this is likely to be a somewhat successful way to save water: “poo do, pee don’t.” This is especially to be useful in areas where households have large families. When this common sense idea is published, other people may have more good solutions to save water. Regardless of the success or not, people will be awakened to disciplined ways of saving. So when we have fires, we will not need as much water from distant places for import. — Frieda Levinsky lives in La Jolla.