Over the previous forty years, the world's meat production has tripled and increased 20%. Compared to poor countries, developed or industrialized countries consume twice as much. The excessive animal rearing necessary to supply the world’s demand for meat negatively affects the entire environment, public health, animal genetic variety, and the general economy. Animal feces releases methane, nitrous oxide, and carbon dioxide, whereas ruminants produce methane through enteric fermentation. Additionally, waste from abattoirs poses a major hazard to the environment and water supplies. Purification and a revolting odor are caused by leftover animal tissues and abattoir blood. The FAO predicts that a severe food scarcity would soon affect the entire planet as the demand for meat will likely rise by more than two-thirds. Alternatives to meat should be created as a strategy, such as cultured meat, proteins derived from plants, and analogues of insect proteins.