Conventional wisdom suggests that the future of coal-fired power generation-from which the United States derives roughly one-half of its power-depends in no small part on the realization of geologic sequestration of carbon emissions in underground formations (for more on this, see Climate Change Deskbook §1.2.3.1.2). Two recent proposals by the U.S. Environmental Protection Agency (EPA) bring this issue to the fore: the Agency's prevention of significant deterioration (PSD) tailoring rule and its geologic sequestration well rule.
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