[palmer]

The CO2 output from Pinatubo was about 42 Mt, and man puts out about 7100 Mt a year. The more important number is that all natural sources release about 150,000 Mt

[thedilg]

Post 18 says, "man puts out about 7,100 Mt of co2(i.e. about 7 billion tons a year.)" This is about 1/20th his reported volcanic output. On the other hand Post 12 says man puts out 22 billion tons a year. This value is 150 times greater than his reported volcanic output.(If my math is correct this is a huge difference.) Does anyone know who is correct, or are they both wrong. Godspeed,

[SampleMan]

The CO2 output from Pinatubo was about 42 Mt, and man puts out about 7100 Mt a year. The more important number is that all natural sources release about 150,000 Mt

Is it safe then to say that man's 42 Mt is less than the average deviation of natural input? I am willing to bet that variations in natural input actually dwarf man's total contribution.