People and animals need the plants not only for food, but also, for breathing. The trees work as lungs in the human body because they filter the air by drawing carbon dioxide and giving oxygen to support human's life. It is logical that ranching is important to secure food for meat eaters, but that is offending tropical rainforests. Millions of hectares of trees have been killed to feed animals. For example, 25 million acres of Amazon rainforests have become grazing land for beef cattle. That means we will lose the normal factory for fresh air. In addition, elimination of forests contributes to global warming. Moreover, the two substantial greenhouse gases are carbon dioxide (CO2) and methane, which contribute to global warming. Millions of tons of these major greenhouse gases are produced by cow farms each year. Consequently, air pollution spreads from losing the plants. According to the unit on climate change by the United Nations Environment Program, "Belching, flatulent livestock emit 16 percent of the world's annual production of methane, a powerful greenhouse gas." Paul McCartney shares that, "If anyone wants to save the planet, all they have to do is just stop eating meat. That's the single most important thing you could do" (Another Inconvenient Truth: Meat is a Global …show more content…
In the United States alone, livestock produces approximately 7 billion tons of waste annually. On the other hand, people produce 300 million tons of waste. These waste products contain high concentrations of potassium, phosphorous, and nitrogen compounds and even traces of antibiotics and metals. These certainly will affect the nature negatively. Not only does waste contain risky items for the environment, but it also has harmful gases like nitrous oxide, carbon dioxide, methane, and ammonia, all of which affect the climate ( Marlow, Hayes, Soret, Carter, Schwab, Sabaté, H.,