Volcanos have the power to alter the earth quickly. However they eject (by weight) @80% ash. The ash has enough weight to settle to the ground ,though it may take many years to do so.

Greenhouse gasses we produce do not fall to the ground. And we make a LOT of CO2. We are dumping it out faster than the plantlife and oceans can use/handle it.

The thought that 6 billion people currently on this earth do not have the power to alter the natural environment is foolish.

Shit, what differerce does it make though? By the time it goes to hell, all of us will be dead. :thumbsup: