What I like for any skeptic to explain, is why are the stratospheric temperatures decreasing as well as the temperatures increasing on the ground? Now if it was solar activity causing this warming, then shouldn't the stratosphere be showing a temperature rise instead of fall (considering that more radiation entering Earth's atmospheres, would heat all atmospheric layers)?
No one seems to address that, that the greenhouse effect has a dual effect, the first is obvious that it traps in more heat below the stratosphere, however two, it also cools down the stratosphere because infrared radiation is less available to heat the stratosphere as it exits back into space.
Besides to deny that CO2 doesn't warm the Earth or causes warming trends, you're essentially denying the greenhouse effect and the types of gases that contribute to it, and therefore you're scientifically wrong. If CO2 didn't retain heat or cause warming periods, Earth would be too cold to be habitable for life.
I should add that even with a increased solar influence in progress, the greenhouse effect will be significantly amplifying the effect of any solar variation, therefore the less CO2 the better, otherwise we may never recover from the effects as a positive CO2 and Methane feedback loop will occur and Earth goes into meltdown. But lucky for us, the water vapor levels will surge and eventually generate super storm conditions and Earth will cool down afterwards in a climate shift. It's not a pretty process though if the warming trend happens too fast to trigger this cooling trend. Ice core records do show cooling periods proceeding after warming one, so presumably Earth will repair itself in time, but the question is, can humanity survive such change?
To be honest, it's too late to do anything about it, as the positive feedback effect is already happening, so there's no point in me arguing a lost cause anymore and this will probably be the last time I'll be bothered talking about it. If anyone doesn't believe it by now, they'll have to learn the hard way...
I suggest everyone should enjoy themselves as much as possible, and when the s*** hits the fan, I suggest you take what happens as a vital lesson to humanity, and that is to never mess around with nature ever again.
I'll admit that I sound rather crazy but meh, we'll wait and see about that 
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"Have a nice apocalypse" - Southland Tales