Climate change, driven by rising atmospheric carbon dioxide from human emissions, is accelerating plant growth but lowering their nutritional value. This phenomenon called nutrient dilution affects herbivores, which comprise over a third of Earth's fauna, as they struggle to consume enough nutrients from their diet, leading to potential population declines. Fast-growing plants store more carbon but have fewer nutrients per bite, affecting diverse species from pandas to grasshoppers. Insects, essential to ecological functions, and livestock also suffer from reduced protein levels, complicating survival and reproduction efforts. The long-term effects on food webs and species interactions require further research.