The market for atmospheric CO2 reaching at least 445 ppm before 2030 spiked from 11¢ to 39¢, reflecting growing concern about accelerating climate change. The global average carbon dioxide set a new record high in 2024: 422.7 parts per million. The increase over 2023 amounts was 3.75 ppm—the largest one-year increase on record.

This unprecedented acceleration has caught climate scientists off guard. In the 1960s, CO2 levels rose by about 0.8 ppm per year, but in the last decade (2015–2024), the annual increase averaged 2.6 ppm. At current rates, the 445 ppm threshold—once considered a distant worst-case scenario—could arrive years earlier than climate models predicted, making the 39¢ odds increasingly realistic.