The Sweaty Penguin is a climate podcast that runs on jokes and holds itself to a fact-check. Host Ethan Brown works from a written script: a mock sponsor spot up top, a stream of puns and pop-culture asides, and short sketch scenes where characters argue over the subject at hand. Under the gags sits real material. Numbered features each take a single subject, among them polar bears, rice, oysters, whales, maritime shipping, permitting and electric vehicles. The polar bear episode covers denning, a shrinking Hudson Bay population, the risks of Arctic oil spills and a debate over whether hunting revenue could fund conservation, drawing on an interview with Dr. Desrochers. A recurring strand follows fossil fuel projects that The Guardian classed as carbon bombs, with features titled The North Dome Gas Field, The Denver-Julesburg Basin and The Bovanenkovo Gas Field. Tip of the Iceberg is the news-facing format. Those episodes break down a current story, then move to Ask Me Anything, where Brown answers a question sent in by a listener. Stories range from COP28 and the Mountain Valley Pipeline to Held v. Montana, Hurricane Hilary and record-breaking heat. One entry pushes back on headlines about the Gulf Stream, and its title, No, the Gulf Stream isn't collapsing in two years, says where it lands. That corrective instinct extends to the show itself. In Rethinking Carbon, Brown admits he had repeated the carbon lag idea in earlier episodes, and Dr. Mann explains why the climate can respond faster to cutting emissions than that idea suggested. Brown says a researcher who did not work on a given episode fact-checks its script, and that mistakes get flagged to listeners in detail. He also describes arriving at the subject with no agenda and turning his critiques on climate activists and journalists when he thinks they get something wrong. The policy argument is practical: an episode on China and India contends their emissions are no reason for the United States to stall, pointing to climate solutions that save money from the start. Saudi Arabia and the COP28 agreement get the same blend of an explainer on Scope 1, 2 and 3 emissions, a private-chef analogy, and a sketch restaging undercover reporters posing as investors. Bonus episodes loosen the format. A holiday mailbag works through skeptical listener questions and then lets ChatGPT help answer troll comments from social media, while the Winner's Circle brings producer Hallie Cordingley onto the show. The China and India episode also hands a news item to Moe, who reports on the Swift parrot almost entirely in Taylor Swift song titles. The result takes the stakes seriously and the delivery lightly.