Um, I was simply stating a fact. Google it. CO2 is a colourless gas.
Yes, it is a greenhouse gas. So what? The question here is not whether CO2 is colourless or a greenhouse gas. It is whether humans cause dangerous global warming and the topic started by poking holes in the Marshall Islanders bitching that the nasty world was drowning their islands by causing the seas to rise. Seas rise naturally and have been doing so for centuries. Coral atolls rise naturally too.
We are trying to isolate and quantify the bits caused by humans and so far we can’t distinguish any difference from the normal natural variability.