"GMO Opponents Are the Climate Skeptics of the Left," declares the headline of a recent piece by Keith Kloor in Slate. The argument goes like this: Just as certain conservative writers flout science by denying the urgency of climate change, there are progressive writers—he named me as a prominent example—who defy an alleged scientific consensus by criticizing the genetically modified crop industry. We're hypocrites, the charge goes, because we thunder against the denial of good science when it comes to climate, but indulge in denialism when it comes to GMOs.
I think Kloor's critique is nonsense. Sure, there are wackos who campaign against GMOs, but not all GMO critique is wacko. In a 2009 roundtable in Seed Magazine, I debunked the idea that there's a scientific consensus around GMOs analogous to the one around climate.
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http://www.motherjones.com/tom-philpott/2012/10/gmo-climate-change-science