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In Other Words: Informational Videos - "How to make things cleaner"

I recently watched another great NOVA episode on "How to make things cleaner". This is a great episode containing many ideas that could fall into one of our often discussed "bio-based" ideas. It's a bit long, but totally worth it, so bring some time!

Watch the full episode. See more NOVA.

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Image via Wikipedia
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What did they do?

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