Where DID all the oxygen come from?

By Holly Lisle

Passing Gas is an excellent intro for both adults and kids on where the air you breathe comes from, and has a couple of funny surprises.

Whether you’re interested in the “climate change” debate, are a homeschooler, are a parent of a middle-school or high-school science-age student, or would simply like to know the answer to the question, I highly recommend the few minutes it will take to watch this.

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