@animalsvideo74: 1. Anything involving fumes or particulates, so most industrial jobs. Metalworking, logging, farming, even food plants. Fucking everything gives off fumes or sends tiny particles into the air which inevitably get into your system. Doesn't matter how good your PPE or the filtration system is, you're getting *some* in you just by walking into the job. Do that for long enough and it's going to accumulate. 2. Trucking for sure, sitting for many hours and trash food are the lifestyle