Did you know that when the trees waive the wind blows?
Don't believe me? Shake a tree, don't you feel a breeze?
That children with autism watch T.V. is not the same as children who watch T.V. get autism.
As has been pointed out by actual scientists and staticticians, autism rates aren't necessarily rising, the diagnosis rate is rising.
Given that Autism is a relativly new diagnosis, you would expect a dramatic rise in it's diagnosis as people who were wrongly diagnosed with some other disorder are now properly diagnosed.