The most known theory regarding the causes of Autism is - Genetic. Some researchers feel that individuals are born with the predisposition to be Autistic. Later on some environmental triggers make them Autistic. They say, there are several genes that lead to Autism, but are yet to find them.
Environmental factors are found to make a great impact on Autism. Studies show that there are several cases of Autism in small towns that are exposed to high levels of toxins & chemicals.
Usually, towns located near the industrial areas or factories have quite toxic air that triggers Autism among children.
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