Conservative estimates, based on real science (not wishful thinking) put mankind's Co2 emissions at over 100 times that from all geological events combined on an annual basis. I have no idea whether this is having a marked effect on our climate, but lets stick to facts please.
If we want facts, then according to the IPCC
"Humans produce about 6% of all CO2 emissions and just under 0.3% of all green house gas emissions"