2012-03-12

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Veritasium

Complete unedited interviews: http://www.youtube.com/watch?v=8dcw98B2Nzg

Trees can weigh hundreds or even thousands of tons, but where do they get this mass from? A few common answers are: the soil, water, and sunlight. But the truth is the vast majority of a dry tree's mass comes from the air - it originated as carbon dioxide