Parkinson's is the second most common neurological disease in the United States. For decades, Parkinson's research has focused on genetics. Today, published research on the genetics behind Parkinson's outnumbers all other potential causes six to one. But Parkinson's rates in the US have doubled in the past 30 years. And studies suggest they will climb another 15 to 35 percent in each coming decade. This is not how an inherited genetic disease is supposed to behave. In a study of half a million Britons, Oxford researchers determined that lifestyle and the environment is 10 times more likely to explain early death than genetics. "I think [the industrial solvent] TCE is the most important cause of Parkinson's in the US," says [Parkinson's expert] Ray Dorsey. Parkinson's is a growing pandemic, and up to 90 percent of cases are caused by chemicals in our environment. Cut exposures like TCE and pesticides, and we can "end Parkinson's" as we know it. Since the 1990s, the number of Americans with chronic disease has ballooned to more than 75 percent of adults, per the CDC. Only 1 percent of the roughly 350,000 chemicals in use in the United States have ever been tested for safety. In its 55-year history, the EPA has banned or restricted about a dozen (by contrast, the EU has banned more than 2,000). Paraquat, the pesticide that appears to cause Parkinson's in farmworkers, has been banned in Europe and China but remains available in the US.