I just read this article on a 'health news' site:
In summary, it states that an MIT researcher has said that half of all children will have autism by 2025 because of the widespread use of glyphosate herbicides (like Roundup). I am pretty much ignoring the 'half of all children' part of the claim since it assumes that the rate of increase in prevalence will continue at a steady pace, and I don't accept that assumption (http://www.cdc.gov/ncbddd/autism/data.html, Is there an autism epidemic?).
As to the main claim that glyphosate causes autism, the researcher has published a graph that shows a correlation between the rate of autism diagnoses and the use of glyphosate (http://people.csail.mit.edu/seneff/glyphosate/glyphosate.html). I would think that the increase in autism should track about 2 to 4 years after the increase in glyphosate (since autism is usually diagnosed around that age), but I'm not sure.
Most of the rest of the article isn't really related to the claim made in the headline.
So, is there indeed a strong correlation between glyphosate and autism, and if so, is there anything to indicate a causal relationship between the two?