Mercury released primarily from coal-fired power plants may be contributing to an increase in the number of cases of autism, a Texas researcher says.
Marking Autism Awareness Day, mother of autistic son tells of her experiences.
Countries around the world are marking Autism Awareness Day in a bid to increase understanding of the condition.
In the UK, Jennie Donnelly, the mother of Eric, an autistic child, tells Al Jazeera about her experiences.