I'm defensibly dissatisfied with large scale farming, both vegetable and animal (watch Food, Inc. and King Corn for starters). However, there may be some redemption for industrial vegetable farming: turns out increasing yields on existing lands alleviated the pressure to convert forest & prairie to agriculture. This in turn allowed for greater carbon-reducing biomass (the preserved forests) than any 'footprinting' by the farming.
I'm struggling to reconcile anything good about industrial farming with the reality of the other facets it destroys. I don't think it grants permission to other unethical aspects of the trade.
Read more at Scientific American.