| http://www.w3.org/ns/prov#value | - Sulfur dioxide causes acid rain; nitrogen oxides cause smog; and carbon dioxide is a so-called greenhouse gas that traps heat in the atmosphere.For coal industry apologists, here is the real kick in the pants: Even without the EPA rules, coal is not really competitive, says Jone-Lin Wang, head of Global Power for the energy research firm IHS CERA. So much for coal executives' fever dreams of a w
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