"The boreal forest is our planet's largest land biome. A scarf around the neck of the world, it spans a dozen countries, from Canada to the mountain peaks of Japan. Parts of the biome are so remote, few humans have ever seen them. But the forest plays a vital role on our planet. It is home to an incredible diversity of species. Its trees clean our air, and its wetlands clean our water. Known as a "carbon sink," the biome plays an important role in...