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Subject: Re: [Homebrew_PCBs] Re: Etching note

From: Kerry Wentworth <kwentworth@...>
Date: 2010-06-14

Malcolm Parker-Lisberg wrote:
> An estimated 0.34 billion metric tons of copper currently exists in the ocean’s waters based on a concentration of 0.25 ug/L and a volume of 1.338 x 109 km3
> >From MadSci Network, Internet site,
> “www.madsci.org”
>
> That's a lot of printed circuit boads
>
>
Cu and CuCl are two different things. There's plenty of copper and
plenty of chlorine in the oceans, but there's plenty of carbon and
plenty of nitrogen in the atmosphere, but thankfully, not much CN (cyanide)

Kerry