Delta Air Lines has faced a significant class-action lawsuit (originally filed in 2023 and ongoing into 2026) regarding its claims of being the "world’s first carbon-neutral airline." The lawsuit alleges that Delta engaged in "greenwashing" by misleading consumers into believing their flights had no environmental impact. At the center of the dispute is Delta's heavy reliance on carbon offsets—investments in projects like forest preservation or renewable energy—to "cancel out" its emissions. The plaintiffs argue that many of these offsets are "junk" or "bunk," failing to provide real, additional carbon reductions that would not have happened otherwise. They contend that Delta charged a premium for tickets based on these "eco-friendly" claims, which were prominently featured on napkins and marketing materials. In response, Delta has argued the suit is without legal merit but has also shifted its strategy, transitioning away from broad offset claims and focusing on sustainable aviation fuel (SAF) and more fuel-efficient aircraft to reach a 2050 net-zero goal.