thephotosocietyさんのインスタグラム写真 - (thephotosocietyInstagram)「Tailors in the town of Numbi, DR Congo. Photo by Carlos Villalon @villalonsantamaria Situated to the west of Lake Kivu, the green hills surrounding the small mining town of Numbi in South Kivu are dotted with mining sites — some, just holes in the ground, others, large hills reduced to quarries. Cassiterite, used for tin and coltan for tantalum, along with gold ore and wolframite, tungsten, are the four most common “conflict minerals” extracted by tens of thousands of Congolese miners. #drcongo #conflictminerals #mobilephones #coltan」3月17日 8時30分