Thankfully the vegans at animal visuals, have done actual research and produced a graph on the actual lifecycle impact of various types of foods/diets:
You can read about the methodology and sources used at: Number of Animals Killed to Produce One Million Calories in Eight Food Categories.
Animal byproducts are largely waste that is allowed to be dumped unregulated into the environment. This is a defacto subsidization of animal foods. Human municipalities have to treat their waste-water, while animal farms and Concentrated Animal Feeding Operations(CAFOs) which actually produce far more fecal matter, do not, and even get to pass off the toxic waste of animals as fertilizer that is actually sold. If this was not the case, whiny meat eaters would have to pay the true cost of meat, and most would have to seriously curtail their meat consumption. It is not some benefit like you like to present it with your obfuscations and deceptions. Over 98% of antibiotics in the United States are given to fodder animals raised for meat. Meat eating is one of the biggest environment and public health hazards. That alleged fertilizer from chicken, cow manure, ground up animals, etc., is literally toxic waste. Even while alive those animals would have dropped dead in short order without their massive dosages of steroids, arsenic and antibiotics.
Are you seriously joking or actually suggesting that everyone who does something should do nothing instead, because they are not doing everything? Or perhaps more important, because it will make Johnny feel better about doing nothing? That is what you are saying.
Why do you think the United States government is organized as a global criminal Empire?
Scientific American wrote:Use It and Lose It: The Outsize Effect of U.S. Consumption on the Environment
It is well known that Americans consume far more natural resources and live much less sustainably than people from any other large country of the world. “A child born in the United States will create thirteen times as much ecological damage over the course of his or her lifetime than a child born in Brazil,” reports the Sierra Club’s Dave Tilford, adding that the average American will drain as many resources as 35 natives of India and consume 53 times more goods and services than someone from China.Tilford cites a litany of sobering statistics showing just how profligate Americans have been in using and abusing natural resources. For example, between 1900 and 1989 U.S. population tripled while its use of raw materials grew by a factor of 17. “With less than 5 percent of world population, the U.S. uses one-third of the world’s paper, a quarter of the world’s oil, 23 percent of the coal, 27 percent of the aluminum, and 19 percent of the copper,” he reports. “Our per capita use of energy, metals, minerals, forest products, fish, grains, meat, and even fresh water dwarfs that of people living in the developing world.”
Well if Americans would actually as a people consume less, along with their imperial allies in the rest of the Anglosphere, Western Europe, Japan, South Korea, etc., then maybe the world would not have to be like it is. But of course that will never happen. These countries will continue to have more and more overweight meat eating people, while the rest of the world increasingly will starve to make debt repayments and due to climate change that is unfortunately gonna affect the Global South and those nearest the equator more than the resource hogging, Global North.