Better proteins beyond livestock: food without the footprint

Producing food through animal agriculture is resource-intensive and environmentally damaging. Livestock use nearly 80% of all agricultural land while providing less than 20% of global calories and about one-third of global protein. Animal farming drives deforestation, methane emissions, water pollution, and biodiversity loss, while also increasing the spread of zoonotic diseases and the rise of antibiotic-resistant bacteria. Systems labeled as sustainable, such as pasture-raised or grass-fed livestock, can even have higher environmental costs per kilogram of meat because of slower growth and greater land demand. There is also increasing public concern over animal welfare, which shows a clear gap between what consumers value and how food is produced. Emerging alternative proteins, including plant-based foods, precision-fermented ingredients, and cultivated meat, show how scientific and traditional food principles can create more sustainable, nutritious, and affordable food systems. Plant-based foods build on long-established whole food nutrition, while precision fermentation and cultivated meat use modern biology to produce familiar proteins without relying on animal farming. Understanding how proteins, fats, and other molecules shape flavor, texture, and nutrition allows scientists to replicate or improve these qualities without using animals. These innovations include meat, dairy, and egg substitutes. Together, they can substantially reduce global climate and disease risks and shift human diets toward a healthier and ethical future.