Volcanos are but one part..
of a very large picture that includes solar activity regional changes like deforestation that cause micro climate changes and a host of other things.
If you look at untainted data from these multiple sources you will see the facts seem to point to we are 10 years into a cooling cycle that correspondes to a cyclical decrease in solar activity.
And by studying history and the science of what happened before you will see that the earth has gone through many cooling and warming cycles before mans factories, cars and planes contributed anything to the air.
To blame man for any global warming or cooling trend is to underestimate Mother Nature.
We can poison the planet, but change its temperature. Not likely.
And you miss the opportunity to understand whatever might trigger the next cycle and allow man to be prepared for it.
Why do people refuse to look to the past for answers to the future?
Because in the end there may be little we can do, but get out of the way.