Cancer cells getting their energy more through fermentation has been known since the 1920s, it's called the Warburg effect, and Otto Warburg even got a nobel prize for it.
The title is editorialized, the original title is "Income-based U.S. household carbon footprints (1990–2019) offer new insights on emissions inequality and climate finance" and the abstract says "In 2019, fully 40% of total U.S. emissions were associated with income flows to the highest earning 10% of households".