Lifetime Costs: The typical total cost for a new septic system over a 20 year period is $6,300 to $13,000 for trenches and mounds, or $13,500 to $32,000 for alternative treatment systems. For multi-household systems, typical trench or mound systems range from $18,500 to $25,000.
Or perhaps because they only looked at children with autism in the Amish community. I wonder if they looked into how many Amish get things like chickenpox, smallpox, mumps, diphtheria, measles, rubella, whooping cough, shingles, the flu, HPV, rotavirus, etc etc.
They are all very serious diseases for children, adolescents and adults. Tetanus (Lockjaw): Bacteria in soil enter through a cut, creating an infection. Sufferers experiences painful tightening of muscles and may be unable to open mouth and swallow. Diphtheria: Highly contagious infection of respiratory tract.