What are the most effective ways to prevent asbestosis?

Asbestosis. Most common in miners of asbestos. Others: shipyard, foundry, and demolition workers, and old brakepad manufacturers. Asbestos insulated homes and offices are not a source of exposure unless you remodel/demolish without respiratory protection. This is now illegal so its unlikely, but you should check with osha representatives at work, and with your builder if you live in an "older" (~70s) homes.