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There's plenty of shit in your home that will kill you if you ingest enough of it (in one dose or over a period of time). But I get that you don't want to add extra than there might not be otherwise.
Also depends on how good the set-up is and the skill of the operator, but again I understand people are generally pretty feckless :) (says he who nearly lost an eye 'servicing' a suspension fork).
relatively, yes but overall still pretty bad for air quality.