>If you have doubts about the scientific understanding of the greenhouse effect, study up on that. But continually bringing up that 0.04% makes it sound like you are clinging to that fact as a "gotcha" and avoiding learning anything more.

After having spent decades debating "climate change deniers", I came to to the realization that the greenhouse effect as thought in schools is vastly oversimplified, and essentially no lay person understands it.

This is not to say that climate change isn't real, but most people don't have the technical background to educate each other, and attempt to do so based on inaccurate models.

Having read hundreds of articles, I still don't understand how to reconcile the greenhouse model with the fact that infrared radiation only travels ~10m in the atmosphere in the bandwidth absorbed by CO2.