> > From: "Brian Walters" <[EMAIL PROTECTED]> > Date: 2008/06/17 Tue PM 09:57:27 GMT > To: "Pentax-Discuss Mail List" <[email protected]> > Subject: RE: The Big Picture > > On Tue, 17 Jun 2008 19:54:19 +0100, "Bob W" <[EMAIL PROTECTED]> said: > > Very interesting, thanks. > > > > I'm somewhat intrigued by the photo of people releasing 400,000 > > plastic balls into a reservoir (ergo man-made) to prevent the sunlight > > from triggering a carcinogenic chemical reaction with the chlorine and > > bromide in the water. I'm not a chemist or a water-scientist in any > > way, but this sounds like kludge upon kludge to me, with the plastic > > likely to lead to further environmental problems somewhere down the > > line. Surely the solution (no pun intended) is to remove, or not to > > add, chlorine or bromide to the reservoir? > > > > > > Yes, without knowing anything about LA's water supply, the usual reason > for putting any sort of cover on a reservoir is to reduce evaporation. >
In which case you would expect white balls. Black ones would be expected to heat the water up. ----------------------------------------- Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
