Bud Rolofson wrote:
>You've probably got mostly organic carbon particles (the main >pollutant
>from that kind of a burning source) in your "black rain" but >it could have
>scavenged some nitrates and sulfates (more from cars, >utilities, et.al.)
>that were in the air too. Nitrate and sulfate >particles can be fairly
>hygroscopic so they will absorb moisture out >of the air as they sit on
>your car. I'd rinse it off as soon as >possible as it could be/become a
>bit acidic.
I'm not super-worried about the rain itself as it is easily washed off, but
I am worried about the smoke and (dry) ash. Ash is deposited on my car
whenever I drive it/have it outside and it even gets into my garage
overnight. In the morining there is a thin layer on my car.
Would this ash by itself, in its dry form, be a worry? We will probably keep
getting the ash for some time...
Cheers,
Michael
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