Could being on a naval ship for 6 months or being putin s shed with a bunchof marines and they had to be exposed to mustard gas and other gases while going through boot camp? Also worked with HVAC installing insulation and to top it off had to use round

Hello Anon

Thank you for writing.

The activities you are talking about can certainly lead to ill-health.

Marines aren't actually exposed to mustard gas or other gasses - they do training in gas chambers but are wearing masks. The only gas they could be exposed to is tear gas but that doesn't have lingering effects.
Round-up has certainly been named as dangerous for anyone around it.

People working in HVAC should be well protected.

You haven't listed any symptoms - what are you experiencing?
Best,
Susan