A complete believer? Welcome to the Church of CAGW! It has to be &#x27;Catastrophic Anthropogenic Global Warming&#x27; because no &#x27;denialists&#x27; deny the fact that carbon dioxide produced by humans helps the atmosphere retain more of the sun&#x27;s heat. That&#x27;s not up for belief; it&#x27;s a fact. The question is: to what extent and what is the nature of the relationship? We do not yet know the answer.