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04-28-2010, 06:29 PM | #1 |
Mad Scientist at Large
Join Date: Jun 2008
Location: Portland, OR
Posts: 14,793
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Am at work and heard a couple guys talking about CFL bulbs, and the one guy comes out with how they really aren't good for the environment because they contain mercury. Well, I did what I always do when I'm not an expert on something, and I hit Google to piss a little wisdom on me and found this article.
Compact Fluorescent Bulbs and Mercury: Reality Check - Popularmechanics.com Quote:
About 50 percent of the electricity produced in the U.S. is generated by coal-fired power plants. When coal burns to produce electricity, mercury naturally contained in the coal releases into the air. In 2006, coal-fired power plants produced 1,971 billion kilowatt hours (kwh) of electricity, emitting 50.7 tons of mercury into the air—the equivalent amount of mercury contained in more than 9 billion CFLs (the bulbs emit zero mercury when in use or being handled).
Approximately 0.0234 mg of mercury—plus carbon dioxide, sulfur dioxide and nitrogen oxide—releases into the air per 1 kwh of electricity that a coal-fired power plant generates. Over the 7500-hour average range of one CFL, then, a plant will emit 13.16 mg of mercury to sustain a 75-watt incandescent bulb but only 3.51 mg of mercury to sustain a 20-watt CFL (the lightning equivalent of a 75-watt traditional bulb). Even if the mercury contained in a CFL was directly released into the atmosphere, an incandescent would still contribute 4.65 more milligrams of mercury into the environment over its lifetime. Like, now you know man. |
04-28-2010, 06:41 PM | #2 |
#voteblackjack
Join Date: Sep 2008
Location: Northwood, NH
Posts: 35,747
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And knowing is half the battle
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