Word: ashes
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...Ash on an old man's sleeve...
...mountain ash...
Some big problems must still be licked. One is the lack of water needed for refining. All big U.S. shale deposits lie in the most arid sections of Colorado, Wyoming and Utah. Another problem is the question of ash disposal: more than a ton of ash is piled up for every barrel of oil produced...
Burn-Out. Plutonium is fissionable and a fine nuclear fuel, but the first reactors did not produce enough of it to replace the U-235 consumed. So their nuclear fuel gradually "burned out," leaving U-238 as a sort of ash. Thus, the reactors of the early atomic age could utilize only a very small part of the uranium fed into them...
...winners, Geoffrey D. Bush '50 of Cambridge and Eliot House, Stephen J. Brademas '49 1G of South Bend, Indiana and Perkins Hall, Francis G. Steiner 1G of New York and 30 Ash Street, Cambridge, will receive grants of 500 pounds ($1,400) annually for study at Oxford University in England...