This is an upvoted comment from a climate change denier posting on YouTube:
Vivek [Ramaswamy]’s statement on climate change was correct, and this immensely helped the Republican brand: Earth's atmosphere is only .04 percent CO2, and humans only produce 5 percent of that, meaning .0016 percent of our atmosphere is composed of human produced CO2, and if humans disappeared entirely, nature would still produce 95% of global CO2 anyway. Climate change is cyclical and caused by solar cycles and Milankovitch cycles (and things we are not aware of yet since it is not fully understood). CO2 levels rise and fall with ocean temperatures. As ocean temperatures cool, more CO2 is absorbed, as they rise, more is released. Higher CO2 levels follow global warming, but don't cause it. We are heading into a cooling period and CO2 levels will fall accordingly. All of the measures proposed to combat supposed anthropogenic climate change (which isn’t happening like they say, so stop buying into it) are based on a fraudulent theory & will cause harm, either to the ecosystem, or human society. There is no climate crisis. There are, however, real forms of pollution that need our attention.
Source: https://www.youtube.com/watch?v=gfax0RHiIVQ&lc=UgzM3LxLciGwLP_ujVV4AaABAg
Given that the overwhelming majority of reputable climate scientists agree that humans are a cause of significant climate change, I am quite skeptical of the above comment.
Are the specific arguments in the YouTube comment correct or are they deeply flawed?