The Perennial Plate, a series about sustainable eating, travels to Montana to visit the 30,000-acre J Bar L ranch, which specializes in humanely raised, grass-fed cattle. 

Officials say they face a public-health emergency, and believe a batch of the opioid may be tainted with an elephant tranquilizer.

The small village of Kivalina is threatened on several fronts by a warming Arctic climate, as the ground it sits on erodes, and the animals the villagers rely on become more difficult to hunt.