Earlier today, we posted a brief item in Grist List about a new study reporting that the herbicide glyphosate has come to permeate air and rainfall in the Mississippi Delta.

That study is alarming in itself, assuming you don’t relish having a weed-killer atmosphere. Glyphosate, a.k.a. Roundup, has become a massively used chemical in Big Ag farming, in good part because it’s the cornerstone of Monsanto’s GMO business. The company’s “Roundup ready” crops are designed to take a glyphosate dousing and keep on growing. That works fine for a while — until glyphosate-resistant weeds start sprouting, at least; but it can also lock farmers into a cycle of dependence, which is why the whole program has been dubbed “agricultural heroin” by some.

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Unfortunately, in seeking to explain why we might not welcome our new glyphosate overlords, we went looking for information about glyphosate’s toxicity and health risks, and we fell for a bit of junk science that we should have steered clear of. We linked to a paper — “Glyphosate’s Suppression of Cytochrome P450 Enzymes and Amino Acid Biosynthesis by the Gut Microbiome: Pathways to Modern Diseases” — that has been widely debunked, for instance here. (As that post points out, any paper that uses a phrase like “exogenous semiotic entropy” ought to set off alarm bells.) We should have known better — particularly since we’ve recently run some in-depth coverage of glyphosate as part of our Panic-Free GMO series.

We’re sorry. The post was up for only a few hours before we corrected it and removed it from our homepage and other listings. We’re not taking it down completely; rather than “disappear” the evidence of our goof, we’re laying it all out for you. Because that’s, you know, the right thing to do.