# If all plant life on Earth disappeared, how long until we run out of Oxygen?

**URL:** <https://boards.straightdope.com/t/if-all-plant-life-on-earth-disappeared-how-long-until-we-run-out-of-oxygen/284841>\
**Category:** Factual Questions\
**Created:** [January 15, 2005, 6:43am UTC](https://boards.straightdope.com/t/if-all-plant-life-on-earth-disappeared-how-long-until-we-run-out-of-oxygen/284841 "2005-01-15T06:43:33Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![CynicalGabe](https://avatars.discourse-cdn.com/v4/letter/c/3e96dc/32.png) [@CynicalGabe](https://boards.straightdope.com/u/CynicalGabe)\
**Post date:** [January 16, 2005, 8:29am UTC](https://boards.straightdope.com/t/if-all-plant-life-on-earth-disappeared-how-long-until-we-run-out-of-oxygen/284841/21 "2005-01-16T08:29:03Z")

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Horseshoes and hand grenades, my friends.

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**Author:** ![Colibri](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/colibri/32/1841_2.png) [@Colibri](https://boards.straightdope.com/u/Colibri)\
**Post date:** [January 16, 2005, 3:54pm UTC](https://boards.straightdope.com/t/if-all-plant-life-on-earth-disappeared-how-long-until-we-run-out-of-oxygen/284841/22 "2005-01-16T15:54:38Z")

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> [@CynicalGabe](#):
>
> Well, I was close.

**Quartz’s** estimate was remarkably close to mine (same order of magnitude, anyway) despite using different starting assumptions.

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