Allegheny, Alliance rewrite coal deal
DENVER, COLORADO - Electric utility Allegheny Energy has modified a coal mine development and supply deal.
Greensburg, Pennsylvania-based Allegheny, which has operations in Virginia and West Virginia, says the changes give it a more secure supply of coal while Tulsa, Okla.-based mine operator Alliance Resource Partners gains flexibility.
Under the new terms, Alliance will supply 20 million tons of coal between 2010 and 2020 from several sources, including Illinois.
Alliance will keep leasing reserves in Washington County, Penn., from Allegheny as it seeks mining permits. Allegheny would receive royalty payments when production begins.
The original agreement, signed in 2005, allowed Alliance to seek the permits and Allegheny to buy up to 2 million tons annually once the mine opened.
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How Bitcoin's vast energy use could burst its bubble
LONDON - The University of Cambridge Centre for Alternative Finance (CCAF) studies the burgeoning business of cryptocurrencies.
It calculates that Bitcoin's total energy consumption is somewhere between 40 and 445 annualised terawatt hours (TWh), with a central estimate of about 130 terawatt hours.
The UK's electricity consumption is a little over 300 TWh a year, while Argentina uses around the same amount of power as the CCAF's best guess for Bitcoin.
And the electricity the Bitcoin miners use overwhelmingly comes from polluting sources.
The CCAF team surveys the people who manage the Bitcoin network around the world on their energy use and found that…
