Asbestos Cancer

Asbestos broken up in the garden can this one exposure cause lung cancer?
The builder who took a shed down for me started breaking up the Asbestos sheets from my shed If i knew he was going to do this I would have stopped him but it was to late. So this was out in the garden and then I was told by my neighbour if i breathe in 1 single Fibre i could have lung cancer in the next 25yrs, so this has scared the life out of me. Just wondering if it would be a threat if it was out in the garden?
No. The people who have cancer from asbestos worked with it on a daily basis. The job that was one of the worst was machining asbestos in a factory. No one has done this in the USA for over 30 years. Not all people who were exposed to the dust got cancer and they were exposed to a lot of dust.
Asbestos and Cancer 1978
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