The document compares the protein and calorie costs of eggs versus vegetarian foods like cereals and soy. It notes that vegetarian proteins are much more economical and provide additional nutrients not found in eggs. Producing meat requires using land and resources that could otherwise feed many more people with a plant-based diet. The large amount of land and crops used to rear animals for meat is inefficient and contributes to world hunger issues. The document advocates for reducing meat consumption to better utilize resources and improve human welfare and wellbeing.