There are some very good causes in the environment for autism and ADHD levels rising – Atrazine, certain plastics during pregnancy, tylonol during pregnancy was linked to ADHD recently, but no good ones tying ADHD and autism to vaccines.
While there are certainly instances where the pharmacists push drugs rather than the underlying cause (See the book ADHD nation) very rarely are the so-called natural cures effective. It’s more like random chemicals that have statistical significance, usually during pregnancy, not after the baby is born, and nothing to do with vaccines.