If we set our minds to it, we can turn back the rising tide of autism. But it will take the courage to embrace the following common-sense goal, in both policy and practice: Expecting parents and young children should not take in chemical contaminants that are known to harm developing minds.

This week, scientists released a list of exactly which contaminants we're talking about. The top 10 chemicals contributing to autism and learning disabilities include commonly used pesticides, as well as chemicals found in many consumer products. The scientists tell us the list is likely to grow. But for now, it's time to act on what we know.

Last week was a busy one for Sofía Gatica. On Monday, she won the global Goldman Environmental Prize for her efforts to protect her children and neighbors from pesticides. On Wednesday, she asked President Obama to investigate Monsanto’s “pesticide poisonings and livelihood harms” in her community and beyond.

It makes perfect sense. After all, both the genetically engineered soy beans that now surround her small Argentine community — and the herbicide those beans are designed to withstand — were produced and aggressively marketed  by a company based right here in the U.S. In St. Louis, Missouri, to be precise.