Similar to Marky's point, although I do in my room, there are modern systems which are more efficient and use less water, which would save gallons of this precious natural resource, furthermore, as Ron noted there are cisterns which have dual flushing modes for economic use of water.
As for urinals in mens general toilets, the flush your own type not every time due to the amount of water used....however in saying this, on an environmental front, the company could install the system, which flushes urinals from the water used from washing hands {which I do every time} so it would be a win win situation and generate regular flushing......although I must shamefully admit, not all "gentlemen" who use the general loo's wash their hands!!!!!
