Scientific approaches don’t always get everything precisely right first time. But they do get things right far, far more often than politicians waving wet fingers in the air. That’s because the ultimate authority, on what is right, is nature herself as revealed by experiment and observation.
Our understanding of the impact of carbon dioxide on climate is a textbook example of scientific method at its best.
John Tyndall discovered, in the 1840s, that carbon dioxide absorbs radiated heat and hypothesised that this helps keep our planet warm. By the 1890s, Nobel-prize winning chemist Svante Arrhenius predicted how much warming a 50% increase in atmospheric carbon dioxide would produce. Twentieth and 21st century industrialization then fly-tipped so much carbon dioxide into the atmosphere that concentrations actually did go up by 50% and the prediction could be tested. The temperature change was close to that predicted by Arrhenius.
Twentieth and twenty-first century climate science has refined Arrhenius’s work but nothing has been discovered which undermines it. This is robust science.
It’s not scientists who don’t know what they’re talking about.