Have been exposed. Exposed. Tonight, fox 28 News Reporter dora miller tells us about the healthrisk of cancercausing asbestos. Asbestos is typically known for causing mesothelioma. We talked to the Iowa Department of Public Health to find out how much is too much exposure and at risks people face. Face. I dont think i was seriously exposed to it, i probably just got a little bit in my lungs. Im sure i got some kind of exposure. Thats brent busch recalling his exposure to asbestos while working at Jefferson High School in 2013. The Iowa Department of f publbl heheth says breathing in a little is expected, the worry comes after long term exposure. Exposure. Were exposed to asbestos in some form every day of our lives, asbestos is a very natural occurring material so were all exposed to some small level. But how much is too much . Ken says that dends, but there are places that have higher amounts and thats not safe. Highest levels in construction zones where theres been very poor manageme