Ah, I see. Well, if we are using the term “waste” to = BODILY waste, then yes, a cow does shit a lot more than a human. But said cow doesn’t drive a car, litter, or dispose of nasty stuff in the dump. So, yeah, if “waste” just means “bodily waste” in these papers, sure- and I said as much. Sounds a bit high, and I can see a lot of estimates, fudge factors, etc. Brendans figure of 250 cattle= 25000 humans is quite a bit higher than Daniels figure of 200 cattle= 5000>10000 humans- taking average figures 333% higher, in fact. But still- I never said animal husbandry doesn’t hurt the environment. It does. But so does farming.
Agriculture as a whole is a significant polluter, which I have said all along. See Daniels cite of: “…AGRICULTURAL runoff, INCLUDING nutrients from animal waste…” (caps mine). Animal husbandry is a significant contributor to this- which I have said all along. The point is- so is farming. Raising cotton, or tomatoes, or whatever-isn’t 100% “safe” for the environment, nor is ranching the only culprit here. (Cotton is especially bad for the environment, for instance)
Now, sure- you can have a “organic” and “green” farm, with far lower pollution & impact. On a traditional ranch, where the cattle aren’t allowed to overgraze- you can have the same sort of lower impact. Are these effective enough so that we can feed everyone?
And, of course the PETA dudes would have you only think that cattle are raised for beef, and that so many gallons of water or tones of grain = some sad amount of beef. But as Brendans cite shows- your average dairy cow produces over 20000 pounds of milk per year. Thus, one may argue that is isn’t effective to convert so many tons of feed into so many pounds of beef, but when you are also getting tons of milk out of the equation, the figures aren’t so bad. Remember- there is plenty of food in the world, enough for everyone. The problem is distribution. Dried milk is a lot easier to transport on a pound for calorie basis that is broccoli… or even corn. Thus, without animal husbandry- especially dairy- the food distribution problem only gets worse- which means more people starve.
I will certainly agree that feeding humans is really doing some nasty things to the environment. Reforms are in order. But a omniverous diet does not impact the environment orders of magnitude more than a vegan diet does.