All things considered, breathing in a chemical used to remove grease from equipment probably isn't a safe bet for healthy living. Especially if you fill your lungs with the stuff for 25 years (not to mention sticking your arms in huge vats of it).

Making a living takes hard work, but I feel sorry for people who are employed by manufacturing plants that have TCE in the air. It's called trichloroethylene, and 14 workers out of 134 displayed symptoms similar to Parkinson's during this small case study. Researchers are saying this doesn't prove TCE causes Parkinson's, but that the results of this exposure definitely draw a strong potential connection to degenerative diseases.

You would think factory bosses might have been wary of such practices. Of course, 25 years ago who would have thought this would be something to worry about?