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Does this picture demonstrate the actual proportions well (from xkcd)?

enter image description here

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    The image references its source, if you read the gray letters at the bottom: Vaclav Smil: The Earth's Biosphere: Evolution, Dynamics, and Change
    – Suma
    Sep 12, 2014 at 11:22
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    It's pretty safe to assume that an XKCD infographic is accurate. That said, there's no harm in being skeptical - that's what we're here for.
    – Bobson
    Sep 12, 2014 at 14:21
  • @Suma The source doesn't seem to be an original research and I don't know how reputable it is as well.
    – sashkello
    Sep 13, 2014 at 8:02

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