Type the term "Straw Man" into a search engine and see what you come up with. It may be easy for you to argue against GMOs and modern cattle farming, but I don't think promoted or even mentioned either in my post.
I enjoy farmer's markets. I bought some lettuce for salads earlier today. The food generally tastes better because it's fresher and doesn't have to travel as far. The drawback is that collectively they have a huge carbon footprint. Millions of small farms, growing food in less than ideal climates, all bringing small loads of their products directly to different markets, mostly using pickup trucks and minivans, tend to burn a lot of gas. Compare that to a handful of efficiently run mega farms, growing food under the best conditions possible, bringing huge loads of food in tractor trailers and container ships traveling along super efficient delivery routes, to conveniently located supermarkest where all of your needs can be met in one stop. The food isn't as good because it has to travel. But, even if it has to come halfway around the world, there are far fewer resources used in growing it, getting it to market, and ultrimately feeding people.
Great article on locally grown food:
http://skeptoid.com/episodes/4162A good amount of the food I eat does come from my own garden. But, as I live on just 1/4 acre in the northeast, I could picture myself getting hungry around January if it were my only source of food. I also hunted most of the meat I ate this year. But, since hunting isn't always reliable, I'm glad I don't depend on it. I'm thankful to have cheap alternatives.
Either way, I am satisfied with the safety and efficiency of most conventional agriculture and have no problem with consuming it.