Mining in eastern Congo is bringing eastern lowland gorillas closer to extinction and destroying national parks, the World Wildlife Fund said yesterday. Thousands of miners are digging for the mineral coltan, which is used in cell phones, microchips, and nuclear reactors, damaging forests in the Kahuzi-Biega National Park and the Okapi Wildlife Reserve in rebel-held areas of the country. The number of gorillas in the highland portion of the park has fallen from 250 in 1996 to between 110 and 130, the group said.