Do Toxins Cause Autism?

I'm watching the webcasts from the 2010 ARI conference and here are some referenced articles.

From the NY Times, a great piece on the link between environmental toxins and autism

http://www.nytimes.com/2010/02/25/opinion/25kristof.html

'autism and other ailments are, in part, the result of the impact of environmental chemicals on the brain as it is being formed'

Kenneth Bock MD of Reinbeck NY, who cares for 2000 kids on the spectrum supports the hypothesis that

1. The primary genetic vulnerability appears to be, in many children, an impaired ability to detoxify
2. Environmental insults include toxins, such as  heavy metals, pesticides and other chemicals, aswell as food sensitivities or allergies and infections.