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<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=875440004-18082013>Cadmium is found as an impurity in zinc. This is not
the same thing as "used in". </SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=875440004-18082013></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=875440004-18082013>I hope
to god your friend is a non-smoker and, even in that event, you had better warn
him not to eat chocolate, potatos, or peanuts, stop drinking Coca-Cola and
immediately refrain from chewing on the end of a yellow-painted
pencil.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=875440004-18082013></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=875440004-18082013>Ah
yes, and be very choosy about the fertilisers in the garden.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=875440004-18082013></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=875440004-18082013>Your
local environmental protection body is probably a good resource on this matter
and, will probably have more to say about pollution falling on the roof than
what the roof is made of. Much the same can probably be said about the soil your
food is grown in.</SPAN></FONT><BR></DIV>
<P><FONT size=2>Nick Pyner<BR><BR>Dee Why NSW </FONT></P>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Greenbuilding
[mailto:greenbuilding-bounces@lists.bioenergylists.org]<B>On Behalf Of
</B>Arnie Katz<BR><B>Sent:</B> Sunday, 18 August 2013 12:15
AM<BR></FONT></DIV>
<DIV dir=ltr>
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<DIV><SPAN class=875440004-18082013><FONT face=Arial color=#0000ff
size=2> </FONT></SPAN></DIV>
<DIV><SPAN class=875440004-18082013> </SPAN>A friend suggested that might
not be such a good idea, since, along with the zinc, cadmium is used in the
galvanized coating. A bit of research verified that, yes, galvanized steel
typically has cadmium in it; </DIV>
<DIV>That was enough for me to abandon the experiment and move to a different
design for enabling my wife, <SPAN class=875440004-18082013><FONT
face=Arial color=#0000ff size=2> </FONT></SPAN></DIV>
<DIV><SPAN class=875440004-18082013><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=875440004-18082013> </SPAN>It does make me question
whether galvanized roofing is suitable for rainwater collection if the water
is to be used for food crops.<BR></DIV></DIV>Arnie Katz<BR>
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