Water is one of the most basic of human needs. A lot of countries, especially those in the developing world suffer from water shortages. Further, studies suggest that the liquid we have so taken for granted in much of the developed world will come under increased stress due to changes in climate patterns as well as other factors.
Do you leave the tap running while washing fruits and vegetables while cooking? Why not take a big salad bowl filled with water and leave the fruits/vegetables to soak in it for sometime. And then, instead of throwing that water away down the drain, why not use it to water your plants or indoor garden? In a world where fellow humans are dying due to lack of water, wasting it is nothing short of a crime.