But as I said, I suspect that the truck(s) that move the goats around emit more CO2 than a lawnmower would. I'm guessing that per-mile emissions from a mower are much higher than a car, but that the truck is moving a much greater distance.
Upkeep of this smaller herd may be an issue however. How much husbandry do goats need?
You guys are confusing the requirements for industrial farming (where you're committed to deliver a certain amount of milk or meat every x weeks) with the basics of animal husbandry. As long as you don't have so many goats that they eat the grass faster than it grows back, everything will be just fine.
Keeping animals on a free range basis is extremely low-maintenance and low-impact. They just eat, poop, sit around and reproduce every so often.
I raise chickens and have looked into having goats for milk (not this year: don't have the time) and fencing is a major issue. One of my neighbors has goats and they are always getting out.
In any case, I believe the point he's trying to make is that it's not an obvious net win in terms of carbon emissions.
Of course, I have no idea what the demand for goat is in that area (surely there are some Indian restaurants that can do a "mutton" curry), or whether the US has the same idiotic regulations that the EU does that forces the shipment of animals for slaughter.....
Source: http://abcnews.go.com/Technology/Story?id=98532&page=1
I can't find any 2 stroke mowers at Home Depot, Lowe's, OSH, or Sears. (The vast majority use Briggs and Stratton engines. B&S makes a few 2 stroke engines, but AFAIK, they're only used in snow blowers.) Where are you finding "generally"?
The trucks driven by lawn service folks generally get around 10-20 mpg. They don't spend hours on most job sites - most jobs are much less than an hour of mowing, with an hour or so doing other stuff. Then it's back in the truck for 15-30 minutes. The mowers less than half a gallon during that time and the trucks use about a gallon between jobs.
Being green is great and it's big business. I agree with most of it, but the fart argument is ridiculous.. though not to the people making a living from it!