Word: hydrogen
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Dates: during 1990-1999
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Hill helped clear up the confusion in the 1980s by carefully measuring the sulfur content of samples taken from the caverns. Her work proved that Carlsbad was carved not by carbonic acid but by sulfuric acid, produced by a reaction between oxygen dissolved in groundwater and hydrogen sulfide bubbling up from deep below the earth's surface. This highly toxic solution, which would have killed anyone present at the time, sculpted the many subterranean chambers at Carlsbad...
These varied sources would produce electricity for local consumption and clean-burning hydrogen for distribution via pipelines. According to one estimate, a single solar-cell farm covering roughly one-quarter the area of New Mexico could supply enough electrically produced hydrogen to replace all the fossil fuels consumed in the U.S. If the necessary real estate can't be found on the planet's surface, the solar collectors could be parked in orbit, beaming energy to earth via high-power microwaves...
...million years ago is the favored explanation for why dinosaurs vanished from the earth so abruptly after having dominated the planet for the preceding 70 million years. The tremendous plume of smoke and dust thrown into the atmosphere by the space intruder's impact, equivalent to perhaps a million hydrogen bombs, would have blocked out sunlight for months. The globe would have gone into a dark, deep freeze, killing first the plants and then the giant lizards that fed on them, directly or indirectly -- paving the way for mammals, and eventually humans, to take over...
...task of devising Eisenhower's escape route from Washington fell to naval aide Edward Beach. His assignment was made all the more difficult given the grim prognosis for Washington should it be hit by a Soviet hydrogen bomb. "It would not eliminate the Potomac River," says Beach, "but it would sure raise hell and dig a deep hole where Washington had been. We would have a deep lake there, so shelters in Washington would have been counterproductive. Even if you survived the blast, you'd probably drown." So Beach and others pressed their imaginations for alternate escape plans...
...envisioned by the Ministry of International Trade and Industry, it will promote two activities: the development of technologies designed to reduce production of carbon dioxide and other greenhouse gases, and the sharing of those methods with developing countries. miti is financing an ambitious effort to generate clean-burning hydrogen, which would not contribute to global warming, by using genetically engineered bacteria. There are also tax breaks and low-interest loans available for environmentally sound industrial projects, and local governments can get tax relief when they purchase electric- rather than gasoline-powered vehicles...