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Feral Pigs on the Roam and Biogas (aka Natural Gas from Manure)
NYT - Feral Pigs Roam the South. Now Even Northern States Aren't Safe. - Jim Robbins 12/16/19 Ranchers and government officials here are keeping watch on an enemy army gathering to the north, along the border with Canada. The invaders are big, testy, tenacious — and they’ll eat