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lavanyasinger
lavanyasinger asks:
Q:

working model for exhibition

i am in 9th grade..i am having science exhibition on 3rd october 2013.. topic is "technology and scientific innovation". there are 4 subtopics there.1.agriculture 2.health 3.environment 4.energy... i ought to choose one subtopic... please send me any working model of any of these topic.... i want soon..
In Topics: Science fair
> 60 days ago

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Expert

greenprof2
Nov 8, 2013
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What the Expert Says:

you could make a model device for filtering polluted water, might be esp useful in the 3rd world.

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Additional Answers (2)

anantheswaran
anantheswaran writes:
u can make a solar vehicle
> 60 days ago

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genermcmillan
genermcmillan writes:
You can consider any device model for CO2 purifier..It is really a good one.
> 60 days ago

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