"Organic farming is not the paradigm for sustainable agriculture and food security, but smart combinations of organic and conventional methods could contribute toward sustainable productivity increases in global agriculture."

There is some very interesting research going on: 

New study challenges beliefs about organic agriculture

Organic agriculture is not as good for the environment as commonly believed, according to a new scientific study reviewing multiple lines of evidence over more than two decades. "Organic farming is not the paradigm for sustainable agriculture and food security, but smart combinations of organic and conventional methods could contribute toward sustainable productivity increases in global agriculture." (Mark Lynas, Cornell University Alliance for Science)

F&FF - Technical and Business Information

Here is the full piece:
Organic Agriculture, Food Security, and the Environment | Annual Review of Resource Economics
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