Carbon Atomic Mass: 12.0107 amu Oxygen, about 16
so carbon itself is really just 27% of CO2 12 / (32 + 12)
so you're not pouring "twice the weight of CO2" of petro, that would be wrong. Its taking 73% of the weight from the air, and putting it back, plus a little more.
it was just a human way to look at it
Carbon Atomic Mass: 12.0107 amu Oxygen, about 16
so carbon itself is really just 27% of CO2 12 / (32 + 12)
so you're not pouring "twice the weight of CO2" of petro, that would be wrong. Its taking 73% of the weight from the air, and putting it back, plus a little more.