@michael_nielsen you've probably also seen graphs of the price - it's dropped precipitously.
US coal production has decreased dramatically over the past year: http://www.eia.gov/coal/production/weekly/ …pic.twitter.com/mU0UKzpv0u
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@akaptur I did not know that. V. interesting, & a little surprising. Do you know what's behind it all? - 2 more replies
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