There is alot of land wasted in the world aswell, and I dont believe for a second that there isn't a way to produce enough food to feed everyone without battery farms, because battery farms can't have been existance for that long, from what I can find they are a 20th century creation.
http://news.bbc.co.uk/1/hi/uk/7180018.stmhttp://news.bbc.co.uk/1/hi/uk/7180018.stm
Theres the ban on battery eggs that is going to eventually happen across the EU.
It is 1 step towards many so I guess if you are right katex we should prepare to starve. Or move out of the EU countries, i'm sure america would never outlaw it.