jeff barbee reports. >> poaching has become a crisis.he number of rhino killed for their horn has gone from 13 in 2007, to over 1,000 in 2013 alone. but a new danger to the park may y be even more disastrous than the widespread poaching problem in the country. a new open-cacast coal l mine on the s southern borrder oof the parkrk threatens this, africa's most important rhino breeding ground. park officials here worry that this new danger could be a deep dark hole for rhino conservation, because the mine will pollute the air with dangerous gases, like toluene e and benzene, and blolow toxic coal dustt over this wilderness area. the mine will also discharge acid mine w water laced with sulfuric acid and radioactive byproducts into ththe umfolozi river,, where the park's animals and the livestock of the surrounding community all drink. >> and w when we come here, we come h here to kind of, lili, to unwind and experience the wild, and now there's a mine happening on the edge of the wilderness, and d it's diluting every experiencece that the