It simmers and rumbles, and every few decades the Tacaná Volcano in southern Mexico erupts in powerful explosions. In 1950, the 4,060-meter-high giant spat out as much lava as in the previous 500 years. For the people living in the subtropical region it's both a blessing and a curse.They profit from the rich, volcanic soil, which is ideal for crops like coffee, corn and beans. But excessive farming is threatening UNESCO's Tacaná Biosphere Reserve. For information go to http://www.dw.de/program/global-3000/s-11487-9798
