The more animals there are being raised for human consumption, the more demand there is for feed crops, fertilizers, farming equipment, seeds and arable land.

FORBES: Grains Over Gold

Which is a shame, because the U.S. has the largest federal water zone in the world, with more ocean area suitable for deep-water fish farming than the country has arable land area.

FORBES: Regulatory Uncertainty Drives A Fish Farmer To Foreign Waters

James Janaway, who farms arable land in the Czech Republic and Romania as well as Hampshire, explains that farming in Eastern Europe is not plain sailing for Britons.

ECONOMIST: Farming