Plastic pollution in the world's oceans is causing widespread welfare harm to seabirds through ingestion, entanglement, and chick mortality that affects hundreds of millions of individuals.
Seabird plastic ingestion causes prolonged welfare harm — chicks dying slowly from starvation as their stomachs fill with plastic, adults experiencing reduced nutrient absorption from plastic loads, and individuals suffering injuries from entanglement. The welfare scale is enormous: hundreds of millions of seabirds across dozens of species are affected by plastic pollution in their foraging areas. This welfare harm is preventable through plastic waste reduction and improved waste management that prevents plastic from reaching the ocean. The wildlife welfare argument for plastic pollution reduction is powerful alongside the conservation argument — individual seabirds experiencing prolonged suffering from plastic ingestion are experiencing a welfare harm that is directly traceable to human consumption and waste patterns.