Incredibly clever photo of a light bulb (sort of)
by David Ng
This one would make an awesome slide when talking about energy generally.
By Brock Davis, via Colossal.
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This one would make an awesome slide when talking about energy generally.
By Brock Davis, via Colossal.
popperfont.net 
it is really very important to use low power light bulbs these days to conserve electricity ”
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