Inhabitat: How about those waterless urinals?
Appel: Waterless urinals are pretty straightforward; from the point of view of the user, there is no real difference. We have them in our own office, which we moved into last year and is also LEED Platinum – the first in New York. Instead of flushing, the urinals have a special drain fitted with a cartridge full of a liquid less dense than urine, which “floats” on top and seals out odors. Like all urinals, they have to be regularly maintained and cleaned and the cartridge has to be changed on occasion.