Originally Posted by Skripka
As a side note, I love listening to all you Americans complaining about how much you pay for gas. I saw unleaded at Â£1.31 / L yesterday, or about US$7.92 / Gallon... Bet you wouldn't drive so many SUV's with those prices!
Google says that's about US$2.09. That's less than what we pay in Virginia.
Originally Posted by bucdan
Then again, us humans release some C also if I remember correctly, so I don't see the issue much
We release exactly as much C as we take in.
Glucose is C^6 H^12 O^6. Six units of C in basic sugar, aka human fuel.
We take in 1 glucose and 6 oxygen and release 6 carbon-dioxide and 6 water.
C6H12O6 + 6O2 ---> 6CO2 + 6H2O
What is important is the source of what we take in. For example, eating food that has been grown with petroleum based fertilizers means that you will release carbon into the atmosphere that was previously locked away underground.