In José Saramago's novel Blindness, when an epidemic of sightlessness sweeps the city, among the foulest signs of civic breakdown is its inability to handle its own excrement. Human waste piles where it lands, left to the elements and not modern plumbing. To newly minted industrial designer Virginia Gardiner, we might as well be blind to our own waste. Her plumbing-free toilet project, the Gardiner CH4, makes us personally responsible for our intimate product—and makes it useful. The toilet turns human waste into biofuel, which could prove indispensable to the 40 percent of people around the world who have no toilets at all.