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Article #1100Re: Bashford says: Ozone confuses me.
From: Greig Ebeling
Date: Wed, 19 Feb 1997 00:00
Date: Wed, 19 Feb 1997 00:00
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Jonathan Shanklin <j.shanklin@bas.ac.uk> wrote: >I guess it all depends on what you mean by 'no significant bio effect'. >There certainly is an effect on plankton, there may be an effect on >species composition. [See Robert Parson's FAQ]. Other substances were >thought not to have a significant bio effect at the time [DDT is perhaps >an example, though this certainly had a direct bio effect] but >eventually problems were seen at the top of the food chain. Of course >if this takes 50 years it probably won't affect you, and therefore isn't >'a significant bio effect'. DDT is an excellent example. It is known that DDT accumulates in the food chain (quite dramatically), and so it was banned. But it was never proved to have negative bio effects. It was banned on the basis of the "precautionary principle". CFCs are banned on the same principle. My point is: that like DDT, CFCs have a value to the community, and removing it will COST the community. Is this cost appropriate relative to the negative biological effects it [may/will] have, considering that there are other uses for environmental protection resources?
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fb58e,a7a84d47f994444 X-Google-Attributes: gidfb58e,public X-Google-Thread: 10607c,a7a84d47f994444 X-Google-Attributes: gid10607c,public X-Google-Thread: 10c480,a7a84d47f994444 X-Google-Attributes: gid10c480,public X-Google-Thread: 10df0c,a7a84d47f994444 X-Google-Attributes: gid10df0c,public X-Google-Thread: fdaee,a7a84d47f994444 X-Google-Attributes: gidfdaee,public From: eggsoft@sydney.dialix.oz.au (Greig Ebeling) Subject: Re: Bashford says: Ozone confuses me. Date: 1997/02/19 Message-ID: <5eepih$e0o$3@coffee.DIALix.COM> X-Deja-AN: 219851233 References: <5cr1ob$1rl$1@coffee.DIALix.COM> <5ctpfe$d7q@usenet.rpi.edu> <5d4efo$72t$1@coffee.DIALix.COM> <32F9EA98.41C6@bas.ac.uk> <5dgb4i$sj$1@coffee.DIALix.COM> <32FF14A5.41C6@bas.ac.uk> <5dumu4$1he$8@coffee.DIALix.COM> <3303BD5B.11D6@qmail.com> <5e3fnb$gvs$1@coffee.DIALix.COM> <01bc1b9d$10774a80$3140f6ce@cseftor.erols.com> <5eaejm$pjj$1@coffee.DIALix.COM> <33099C40.41C6@bas.ac.uk> Organization: DIALix Services, Sydney, Australia. Newsgroups: talk.environment,sci.environment,aus.politics,aus.environment.conservation,aus.environment.misc