Saving Scottish Pearls

In the Scottish Highlands, freshwater pearl mussels are a particularly prized part of the environment. Julius Caesar invaded Britain to seize the gems, and they even adorn the Crown of Scotland. But poaching and climate change have imperiled the mollusks. Now the likes of environmentalists, hospitality industry players, and whisky distillers are fighting to save the pearl mussels from extinction through an unlikely method: planting trees.