Update [2009-3-14 16:17:10 by Tom Philpott]:The original version of this post, titled "Strawberry Surprise," contained errors that I regret. I had mistakenly read the below-linked account of an MIT study to mean that sulfuryl fluoride was registered for use by the EPA as a pre-planting fumigant for strawberries. Actually, the chemical is registered only for post-harvest use on food, as well as a structural fumigant for termites. I also reversed the phrases "methyl bromide" and "methyl iodide" on two occasions. Again, I regret these errors.
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Chemical fumigants are a staple of the industrial-food system. They're used to sterilize soil before planting large monocrops, and also to control pests in stored food like grain and dried fruit. The building industry, too, uses them, mainly to fight termites. In the past, fumigants have caused much environmental damage, and tend to be quite toxic for humans, too. Now comes news that the building industry's new favorite fumigant -- sulfuryl fluoride -- is a greenhouse gas 4,800 times more potent than carbon dioxide, according to a recent MIT study.