As this article from the Washington Post highlights.
Polysilicon is a core component in any photovoltaic cell, and its manufacture is quite a toxic process, with one of the major by-products being silicon tetrachloride, an extremely noxious and poisonous chemical that is difficult to handle, and even more difficult to recycle back into the manufacturing process. The capital equipment costs simply to handle this one chemical is one of the main reasons why the production of polysilicon is so expensive in the Western world.
Now many manufacturers source their polysilicon from China. I hope, if they read this, they may think again.
See, by trying to manufacture as cheaply as possible, even something as green as a photovoltaic cell can be highly toxic to the environment.
Junkk.com promotes fun, reward-based e-practices, sharing oodles of info in objective, balanced ways. But we do have personal opinions, too! Hence this slightly ‘off of site, top of mind' blog by Junkk Male Peter. Hopefully still more ‘concerned mates’ than 'do this... or else' nannies, with critiques seen as constructive or of a more eyebrow-twitching ‘Oh, really?!' variety. Little that’s green can be viewed only in black and white.
Monday, March 10, 2008
2 comments:
I believe in freedom of speech. But I also don't like bullies on blogs, even verbal ones, as they can drive away those with something valid to say... or offer.
Subjective is fine, but well argued and substantiated is even better. Calm and polite tops. Anything that crosses my personal line will not go up. There may be reasons given, but not guaranteed.
I'm not too keen on 'Anon' as a handle (and the content usually explains why), so if that's what you opt for it may not make it. Sorry.
Well, at least they have just decided they don't want our carrier bags any more. No more plastics going Chinawards!
ReplyDeleteJust a shame that they are not quite so diligent in other areas... or the numpties who seem keener to look green than actually concern themsleves with the full story, especially provenance chains.
An interesting insight from a plastics recycler just added to the Plastic Bags category. Not a big fan of most claimed eco-alternatives as they just poison the recovery chain.
I'm not encouraged. It's obvious that we need joined-up thinking across the board at high level, based on clear science and a commitment to the enviROI above any agendas or targets. But sadly froth, knee-jerk and spin are all we seem to be getting.
Thanks for highlighting this problem.
ReplyDeleteThere is a solution (other than hoping the Chinese "do the right thing").
Recently-developed commercial products in the US use "solar paint" or "solar ink" to make solar panels without silicon. The materials are layered organic and inorganic devices. These extremely light weight and are very cost effective, making solar power now "cheaper than electricity from coal", it is claimed. However, these relatively small companies need to expand production capacity dramatically, and I think that they should get significant tax credit to do so.
For more details, see this blog entry on Nanosolar
and this collection of articles:
http://www.gather.com/searchResultsArticles.jsp?contentType=Articles&keywords=nanosolar&submit.x=0&submit.y=0
Best wishes! Jim