Word: vaporizer
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...didn't invent distillation. The trick is to do it using as little energy as possible. However, 1,000 watts of heat won't boil much water, so Kamen developed a closed system, powered by whatever fuel is at hand, that traps the energy released when the boiled water vapor recondenses. Essentially, he's recycling heat. Result: a low-power, low-maintenance device that will cost around $1,000 to manufacture and makes 10 gal. of drinkable water an hour...
...cell generator provides a kilowatt of continuous power for eight hours on a single tank of environmentally correct hydrogen. The AirGen is a tad bulky (about the size of a mini-fridge), but you can roll it under a desk. Unlike a gas-powered generator, it emits only water vapor and heat, so it's safe for indoor use. INVENTOR Coleman AVAILABILITY $5,995, consumer version using low-pressure hydrogen canisters due shortly TO LEARN MORE fuelcellstore.com...
Just about everybody agrees that we would be better off using hydrogen instead of gas for fuel. For starters, hydrogen makes water vapor instead of carbon monoxide when it's burned. But building a safe, efficient hydrogen vehicle is another matter. Enter the Aqwon, the first hydrogen-powered scooter to meet Germany's stringent regulatory standards. The Aqwon can hit 30 m.p.h. with its two-stroke engine, but the biggest challenge was building a fuel tank that could safely store the hydrogen. In case of accident or fire, the Aqwon's tank simply freezes. If only the Hindenburg...
...economy, I have never seen anything like them. He made a humidifier for his bedroom out of a large coffee can, a handkerchief and a wooden rod. The handkerchief, dipped in the water in the bottom of the can, drew moisture up and out; placed near a vent, vapor diffused through the room. His rugged creativity sparked my initial love of science, one that remains with me today—turncoat though I am from math to social studies...
Hydrogen Fuel Cell For carmakers, it's the ultimate green machine: a system that runs on hydrogen and oxygen and spouts only heat and water vapor. GM says it could start mass-producing fuel-cell cars by 2010. But makers of consumer electronics may beat them to the punch. In two years NEC plans to introduce a fuel-cell-powered laptop that runs 40 hours between charges--very handy in, say, a massive blackout. Portable fuel-cell power generators sell for a mere...