To test possible solutions, Firmenich had to make its own "poop perfume," mimicking the scent of a pit-style latrine. Gates bravely takes a big whiff. He colorfully describes the odor as "a strong kick to the nostrils, a potent combination of sewage stink, barnyard sweat, and bitter ammonia topped off with vomit (or was it Parmesan cheese?)."
— Bill Gates teams up with Firmenich to work on global sanitation issues. Read more at Bill Gates takes a snort of 'poop perfume.' For a good cause at CNET.