gas

Gigantic megaships that rival anything afloat could help energy giant Shell drink the proverbial milkshake by tapping undersea gas fields worldwide. They can also safely ignore nature's wrath and weather typhoons while continuing gas sucking operations.

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To live on the banks of Africa’s Lake Kivu is to risk your life every day. Large amounts of methane, carbon dioxide and hydrogen sulfide gas are dissolved in various layers of the lake’s deep waters. Scientists warn that a disturbance such as a volcanic eruption or earthquake could cause a redistribution of the lake’s waters and the gases in them. This shuffling, known as an overturn, could unleash an invisible, suffocating cloud of these compounds—a rare event known as a limnic eruption—killing as many as two million people nearby.

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Trash is a stinky topic. With 130 million tons of it hitting landfills annually, it is the nation's largest human-caused producer of methane gas. And now, residents in Florida's St. Lucie County are turning that stench to gold. Or at least to gas. The county has paired up with Atlanta-based company Geoplasma to implement a plasma gasification plant.

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Your car is going to drive you to work someday. Until then, car makers are experimenting with ideas that take control away from you in subtle, helpful ways – mostly to help increase fuel efficiency.

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Earlier this week, we reported on research efforts to produce hydrogen gas for fuel cells through artificial photosynthesis and discovered the technology was still a long way off. Well, how about good old natural photosynthesis? That, too, is a process in its infancy because there are quite a few things we need to manipulate in order to produce enough hydrogen to make it worth our while.

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For more on the Civic GX's natural-gas powertrain and the innovative home-fueling station that keeps it going at a fraction of the cost of gasoline, launch the slideshow.

Behold the car that could displace the Toyota Prius as the eco-ride of choice. The new natural-gas-powered Honda Civic GX uses domestically produced fuel–the same stuff your gas stove burns–that costs as little as one third the price of gasoline. The American Council for an Energy-Efficient Economy calls it the cleanest-burning internal-combustion vehicle on Earth.

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Cycle your way out of traffic jams and high fuel costs-without breaking a sweat. Simply slide a canister of gasoline into your water-bottle holder, clip a throttle to your handlebars, and swap your front wheel for the Wheel, designed by Denver-based RevoPower (revopower.com). The Wheel´s hub holds a 23cc, two-stroke internal combustion engine and a superthin gear train; less than three inches thick, it all fits between the prongs of your bike´s front fork.

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