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Dear EarthTalk
What’s going on with all the cases of autism cropping up and no one seems to know why? It stands to reason it must be something (or some things) environmental, yet every study allegedly turns up no conclusion? What are the possible causes? -- Jessica W., Austin, TX...
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"Autism affects one in every 150 children born today in the U.S., up from one in 500 as recently as just 10 years ago." credit this image to "jbcurio, courtesy Flickr."
