Possibly. I remember that my Father had Parkinsons, but he loved to
clean up from work by using solvents on his hands and arms to remove
everything after working, like grease and paint. He developed the shakes in his arms and hands mostly. I have it in my left hand, but I think it is due to a pinched nerve in my left elbow. Solvents are definately a source as they enter the body by soaking through the skin. People that work hard outside may be more prone to using gasoline, or paint thinners to do the initial clean ups, then use soap and water later on to get rid of the smell of the solvents.
Your environment is a hard one to pin down. Partly, that's because it covers a lot of ground. It's everything that's not your genes, which could mean where you live, what you eat, chemicals you've come into contact with, and more.
We do come into a lot more chemicals than were prevalent a few hundred years ago, but back then the average life expectancy was 45 years, now it is approaching 90 years for many groups of people on the planet.
Back then, people got sick and either got better, or they died, and no one
really knew why. Now we know about many diseases, but not all, and have developed many methods to cure, or, at least to delay death.
We now recognize lots of different types of cancers, some we can treat, some we can not. As for Parkinson's Disease, I suspect a combination of a persons genes, and the chemicals they are exposed to