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When all plant life on Earth runs out of carbon to grow then what happens?

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Patriot96 · 56-60, C
Humans a carbon based
Harmony · 31-35
@Patriot96 yes, but we don't absorb Co2. What about plants?
Patriot96 · 56-60, C
@Harmony no we exhale CO2. plants use it
Harmony · 31-35
@Patriot96 do you think all the plants will survive on our breath?