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Mr.Rakes PBL

for mr.rakes class.
by

Trinity Cooper

on 5 May 2010

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Transcript of Mr.Rakes PBL

Coal then, now, and after. The coal business in the future holds many wonders. Washington, DC – Leading academics from an interdisciplinary Massachusetts Institute of Technology panel issued a report today that examines how the world can continue to use coal, an abundant and inexpensive fuel, in a way that mitigates, instead of worsens, the global warming crisis. :) Sounds like a good idea to me. Reconstructing the nature and evolution of environments requires painstaking study of clues left in the rocks and an understanding of how modern environments evolve through time. Underground mining is used when the coal seam is buried several hundred feet below the surface. In underground mining, workers and machinery go down a vertical "shaft" or a slanted tunnel called a "slope" to remove the coal. Mine shafts may sink as much as 1,000 feet deep. Surface mining is used when a coal seam is relatively close to the surface, usually within 200 feet. The first step in surface mining is to remove and store the soil and rock covering the coal (called the "overburden"). Workers use a variety of heavy equipment--draglines, power shovels, bulldozers, and front-end loaders-to expose the coal seam for mining. There are two ways to remove coal from the ground: surface mining and underground mining. Coal keeps the lights ON. They say clean coal is the future. Do you agree? clean coal is an umbrella term used primanily to describe technologies that may reduce emissions of carbon dioxide. Which means unlike regular coal it keeps the air clean. As the world moves away from the Industrial Age and deeper into the Information Age, the relics of our former industries can been seen aging and abandoned. All for coal. Often, older industrial buildings and sites are so polluted with the materials once used or made there that the locations can’t be used for much else. Since they can’t be used, they simply sit and gather the layers of time that make them fascinating until they are demolished, repurposed, or completely forgotten about. These abandoned factories, mills and mines have served their useful lives and now stand silent.

coal today is being battled with the problem that it polutes the air. That might be the case but they get closer everyday to fixing that problem. Thats why they have clean coal it isn't as damaging to the air. Clean Coal Today is a quarterly newsletter of the U.S. Department of Energy, Office of Fossil Energy (FE), Office of Clean Coal. COAL;; Past-Present-Future Catherine Lee and Trinity Cooper
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