CAMBRIDGE, MA - After carefully taking a look at the diagram, local resident Austin E. Shewster was overheard in a Harvard restroom Monday furiously debating which dual-function flush option best suited his needs. Observing the sodden, indeterminate mess he had just expelled, Shewster contemplated whether to pull up or push down on the cheery green germ-protected handle. “Pulling up on the handle (liquid waste) uses a mere 1.1 gallons of water, while pushing down uses 1.6 gallons of precious life-giving fluid”, he muttered anxiously to himself.