One of the challenges with this style of study is that it is difficult to account for every aspect of life which might affect the probability of developing autism, such as family history.
It means the study cannot say that autism is caused by traffic pollution, merely that there could be a link between the two.
Sophia Xiang Sun, from the University of Cambridge’s autism research centre, argued that cutting pollution would be a good idea anyway.
well autism could also be linked to global climate change!
Just think about it!!