Science journalist Peter Hadfield, working under the name Potholer54, takes on a single claim repeated in both An Inconvenient Truth and The Great Global Warming Swindle: that ice cores show carbon dioxide levels changing after, not before, temperature. He walks through the ice core data itself, citing studies like Caillon et al. in Science and Shakun's 2012 paper in Nature, to show what the lag actually means and why a few centuries' delay at the start of a warming period does not rule out CO2 as a driver later in the cycle. Graphs from skeptic sites like Watts Up With That and Jo Nova's Skeptics Handbook appear on screen alongside the peer-reviewed papers they draw from, so viewers can compare the selective reading against the original research. Hadfield also traces the greenhouse effect argument back to a 1972 Nature paper by J.S. Sawyer. The approach throughout is source-checking rather than advocacy: pulling the original citation for a widely shared graphic and testing whether it says what the meme claims.