Lake Baikal in Asia was once the cleanest in the world, with over 700 different kinds of plant and animal life.
Lake Baikal in Asia was once the cleanest in the world, with over 700 different kinds of plant and animal life.
亚洲的贝加尔湖曾经是世界上最清洁的湖，湖里有700多种不同的植物和动物。