There are many easy steps that we can take to protect the planet. One of these steps is to become vegetarians. There are countless reasons why everyone should become a vegetarian. Having a vegetarian diet can lessen the effect of climate change and pollution. It also saves water and and other resources like forests. Meat production causes more greenhouse gas emissions than transportation. Converting to a vegetarian lifestyle conserves 50 percent more emissions than driving a Prius. 30 percent of Earth's land mass is used to raise animals. 70 percent of the grain in the United States is fed to farm animals. There are 795 million starving people in the world that could eat that grain. There is almost 80 percent of deforested land in the Amazon rain forest that is now cattle pasture. If we become vegetarians, we would reduce water usage by 60 percent. There are so many great arguments to have a vegetarian diet. More people should become vegetarians.

http://www.choos eveg.com/environment
http://www.mercyforanimals.org/forget-s … save-water
https://www.wfp.org/hunger/stats

Vegetarianism may help one's carbon footprint, however there's also an argument of animal population regulation. If everyone switched to vegetarianism one's carbon footprint may be reduced, however we need to consume meat in order to keep animal population in check.

While vegetarianism could help reduce our carbon footprint, having every person become a vegetarian could really affect Earth. I don't know if you're aware of this, but most humans are omnivores. By being omnivores, humans regulate the animal population (by eating them). If every human became a vegetarian, there would be an unbalance in the food chain; there would be more consumers and less producers. This could be disastrous. Many non-animal foods would become scarce. Also, since producers would become scarce, and producers breathe in Carbon Dioxide and breathe out Oxygen, there would be *more* Carbon Dioxide, not less. Therefore if we all become vegetarians, we will be increasing our Carbon footprint.
http://matadornetwork.com/bnt/why-veget … the-world/
https://www.theguardian.com/education/2 … vegetarian
http://articles.mercola.com/sites/artic … world.aspx
http://listverse.com/2013/06/05/9-reaso … tarianism/

While I do agree very much with your arguments, I also have a few disagreements.
First off, I would like to state that the consumption of animals contributes greatly to the livestock population. The overpopulation of these animals, due to the lack of humans eating them or their products, would exceed the 70 percent of land they populate. Secondly, these animals could greatly help the hunger circumstances in our world significantly. Since the population is already really high, these countries with nutrition needs could benefit from the nutrient rich food that comes from these animals. Another reason I would support the consumption of animals is because with every depopulation, there is an overpopulation. When having fewer cows, there is more vegetation to supply oxygen. Little do people know, but methane gas produced from the animals themselves have a severe impact on our environment. Around 2/3 of ammonia comes from cows alone. Too much of these gases can alter our world for the worse. For my last argument, I would like to say that while I do not agree with the mass slau ghter of animas, I certainly feel that there are more ways to ethically take care of it. Without the mass industries or killing animals, we could do it in a way that both gives the animals better lives, but makes us healthier as well. The ways it would make us healthier include better nutrition, helping our morals, and lessening the industrial gases produced by the factories. However, we would still have to combat the overpopulation by consuming them ourselves.
http://animals.howstuffworks.com/mammal … ne-cow.htm