Could autism be linked to rainfall?

November 5, 2008 2:45:28 PM PST
Children who live in the US northwest are more likely to have autism and researchers are starting to wonder if it has something to do with rainfall. Scientists at Cornell University are now searching for an environmental link with autism.

The researchers are looking at autism rates from state and county agencies and plotting them against daily precipitation reports.

No one knows what causes autism. One theory is that a chemical or chemicals in the upper atmosphere are transported to the earth's surface through rain or snow. They also wonder if keeping children inside more often due to rainy weather has some kind of link.