CO2 does have benefits in our atmosphere, its plant food and more CO2 in our air means more plants. We are actually making the world a greener place.  Plus we are still technically in an ice age, the planet goes into them and out of them periodically, the polar ice caps will melt if we are here or not.  

That number i gave for the output of the sun is only the portion of heating the sun give off that hit our planet, the actually output is 4x10^23 watts. The 174 quadrillion watts actually hits us.