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Firewood, Heating and Wood Burning Equipment
Heating Cost per Hour of Five Fuels
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<blockquote data-quote="habanero" data-source="post: 1196487" data-attributes="member: 12443"><p>About the only thing I can think of is some coal can contain pretty high levels of mercury and other heavy metals that may be concentrated in the ashes. I'm not sure if it's enough to really worry about or not, though. Otherwise, the ashes can have high sulfate levels, but that isn't usually too much of a concern on most gardens.</p></blockquote><p></p>
[QUOTE="habanero, post: 1196487, member: 12443"] About the only thing I can think of is some coal can contain pretty high levels of mercury and other heavy metals that may be concentrated in the ashes. I'm not sure if it's enough to really worry about or not, though. Otherwise, the ashes can have high sulfate levels, but that isn't usually too much of a concern on most gardens. [/QUOTE]
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