Volcanic aerosols cause temporary cooling for 1-2 years, while CO2 from human activity remains in the atmosphere for hundreds of years.
We are just getting ready for a super volcano eruption
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And how much sulfur do we need released every year to counter the warming and is it just introducing a more suffocating problem?
Bah but who needs oxygen..
When air contains an estimated 21% oxygen. Humans will need to worry about the amount of oxygen in the atmosphere in about one billion years when Earth will no longer be able to support life, according to NASA scientists. (Heh... tell that to people in Byrnihat in India; am I right, ha!)
There are better things to be worried about. Beside Orange is the new Black.