Glad to hear about the noble task of Mr Aabid Surti of Mumbai. It is astonishing who much of water we can waste within our homes. For instance, if we learn the close the tap while brushing our teeth in the mornings, we can save around 750 liters/month/person. High rise buildings have water under high pressure and hence the water wasted by keeping the taps open while brushing, shaving and while the maids are cleaning the vessels is quite high. We can also make a difference if we follow this at home and encourage our children too.