[KarlInOhio]

You're not going to get 40 tons of CO₂ out of 1200 pounds of jet fuel. You would probably get a little under 2 tons.

[coloradan]

You may be right, but you'd also get trillions of tons of air with an extremely slightly elevated carbon dioxide concentration.

[expatpat]

Good point, but I make it 4400 lbs, more than 2 tons.

[Bob]

You're not going to get 40 tons of CO2 out of 1200 pounds of jet fuel. You would probably get a little under 2 tons.

I think you're a lot closer than the 40 tons that's claimed.

By my rough calculation: Each atom of carbon burned (atomic weight 12) combines with two atoms of oxygen (each atomic weight 16) and results in a CO₂ molecule with an atomic weight of 44. Ignoring the hydrogen atoms (atomic weight 1), 1200 pounds of jet fuel, if all carbon, would result in about 4400 pounds of CO₂ produced.

[grey_whiskers]

Re-read the numbers. 2400 lbs (pounds) of jet fuel, 800 lbs (pounds) of CO₂.

Cheers!