In Europe, the volcanic ash danger travels at high altitudes, but for Iceland's farmers the problem is very much on the ground. Farmers across the region where the volcano erupted this week under the Eyjafjallajokull glacier have been scrambling to protect their herds from inhaling or ingesting the ash, which can cause internal bleeding, long-term bone damage and teeth loss. Near Skogar, south of the volcano, the ash blew down from the mountain, blotting out the sunlight and covering everything - pastures, animals and humans - in a thick, gray paste.