And your proof for this would be.....?
Tell us what the percentage content of our atmosphere is which is carbon dioxide. It is minuscule.
Define "significantly". That word has no real meaning outside of a framework of definition vis a vis the subject.
I suggest you define, and offer proof instead of just posting the AGW or ACC talking points.
Concentrations have increased by about 1/3 over the last 200 years, mostly in the last few decades. This is about 1/3 higher than it's been in the last 500,000 years or more.
Significant, in my post, was used to refer to "statistically significant," not to imply causation of any particular phenomena. Here's a discussion of statistical significance. http.wikipedia.org/wiki/Statistical_significance A 35% increase is most definitely significant by these criteria.
Those of us who question the warmists are not well advised to question the basic scientific facts. Yes, CO2 is a trace gas, 385 or so parts per million, as compared to about 210,000 parts per million of oxygen.
But small amounts can have big effects. A tiny amount of many poisons can kill you before you hit the ground.
Pointing to the small amounts involved or poo-pooing the actual as opposed to faked science are not good strategies for resisting the warmists. They just make us look like anti-scientific yahoos.