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"Okay, Google, how much co2 do humans exhale a year?"
"The average human exhales about 2.3 pounds of carbon dioxide on an average day."
Grrr... Make me do math...
2.3 pounds * 365.25 * Oh wow, we hit 7.5 billion. Did we have a party? = 3 150 281 250 short tons
Wait, why did it give me four different answers? Which one is it, Google?! What are you trying to hide?!
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